161590897 has 8 divisors (see below), whose sum is σ = 174305600. Its totient is φ = 148916880.

The previous prime is 161590883. The next prime is 161590901. The reversal of 161590897 is 798095161.

It is a happy number.

161590897 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161590897 is a prime.

It is a super-2 number, since 2×161590897² = 52223235986529218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161590867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1647 + ... + 18052.

It is an arithmetic number, because the mean of its divisors is an integer number (21788200).

Almost surely, 2^161590897 is an apocalyptic number.

It is an amenable number.

161590897 is a deficient number, since it is larger than the sum of its proper divisors (12714703).

161590897 is a wasteful number, since it uses less digits than its factorization.

161590897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20343.

The product of its (nonzero) digits is 136080, while the sum is 46.

The square root of 161590897 is about 12711.8408187013. The cubic root of 161590897 is about 544.6769086320.

The spelling of 161590897 in words is "one hundred sixty-one million, five hundred ninety thousand, eight hundred ninety-seven".