165190647 has 4 divisors (see below), whose sum is σ = 220254200. Its totient is φ = 110127096.

The previous prime is 165190639. The next prime is 165190657. The reversal of 165190647 is 746091561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 746091561 = 3 ⋅248697187.

It is not a de Polignac number, because 165190647 - 2³ = 165190639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165190657) 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, 27531772 + ... + 27531777.

It is an arithmetic number, because the mean of its divisors is an integer number (55063550).

Almost surely, 2^165190647 is an apocalyptic number.

165190647 is a deficient number, since it is larger than the sum of its proper divisors (55063553).

165190647 is an equidigital number, since it uses as much as digits as its factorization.

165190647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55063552.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 165190647 is about 12852.6513607115. The cubic root of 165190647 is about 548.6918187667.

The spelling of 165190647 in words is "one hundred sixty-five million, one hundred ninety thousand, six hundred forty-seven".