161946607 has 4 divisors (see below), whose sum is σ = 171472896. Its totient is φ = 152420320.

The previous prime is 161946593. The next prime is 161946637. The reversal of 161946607 is 706649161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 706649161 = 2161 ⋅327001.

It is a cyclic number.

It is not a de Polignac number, because 161946607 - 2⁷ = 161946479 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 161946607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161946637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4763119 + ... + 4763152.

It is an arithmetic number, because the mean of its divisors is an integer number (42868224).

Almost surely, 2^161946607 is an apocalyptic number.

161946607 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

161946607 is a deficient number, since it is larger than the sum of its proper divisors (9526289).

161946607 is an equidigital number, since it uses as much as digits as its factorization.

161946607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9526288.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 161946607 is about 12725.8244133730. The cubic root of 161946607 is about 545.0762814418.

It can be divided in two parts, 16194 and 6607, that added together give a square (22801 = 151²).

The spelling of 161946607 in words is "one hundred sixty-one million, nine hundred forty-six thousand, six hundred seven".