161602319 has 4 divisors (see below), whose sum is σ = 163878480. Its totient is φ = 159326160.

The previous prime is 161602313. The next prime is 161602333. The reversal of 161602319 is 913206161.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 161602319 - 2¹² = 161598223 is a prime.

It is a super-2 number, since 2×161602319² = 52230619012355522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161602291 and 161602300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161602313) 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, 1137974 + ... + 1138115.

It is an arithmetic number, because the mean of its divisors is an integer number (40969620).

Almost surely, 2^161602319 is an apocalyptic number.

161602319 is a deficient number, since it is larger than the sum of its proper divisors (2276161).

161602319 is an equidigital number, since it uses as much as digits as its factorization.

161602319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2276160.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 161602319 is about 12712.2900769295. The cubic root of 161602319 is about 544.6897417664.

The spelling of 161602319 in words is "one hundred sixty-one million, six hundred two thousand, three hundred nineteen".