161083965 has 16 divisors (see below), whose sum is σ = 294553728. Its totient is φ = 73638336.

The previous prime is 161083961. The next prime is 161083969. The reversal of 161083965 is 569380161.

It is an interprime number because it is at equal distance from previous prime (161083961) and next prime (161083969).

It is not a de Polignac number, because 161083965 - 2² = 161083961 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161083961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 766962 + ... + 767171.

It is an arithmetic number, because the mean of its divisors is an integer number (18409608).

Almost surely, 2^161083965 is an apocalyptic number.

161083965 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161083965 is a deficient number, since it is larger than the sum of its proper divisors (133469763).

161083965 is a wasteful number, since it uses less digits than its factorization.

161083965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1534148.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 161083965 is about 12691.8857936872. The cubic root of 161083965 is about 544.1067374991.

The spelling of 161083965 in words is "one hundred sixty-one million, eighty-three thousand, nine hundred sixty-five".