159920465 has 4 divisors (see below), whose sum is σ = 191904564. Its totient is φ = 127936368.

The previous prime is 159920437. The next prime is 159920489. The reversal of 159920465 is 564029951.

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

It can be written as a sum of positive squares in 2 ways, for example, as 54878464 + 105042001 = 7408^2 + 10249^2 .

It is a cyclic number.

It is not a de Polignac number, because 159920465 - 2¹⁸ = 159658321 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15992042 + ... + 15992051.

It is an arithmetic number, because the mean of its divisors is an integer number (47976141).

Almost surely, 2^159920465 is an apocalyptic number.

It is an amenable number.

159920465 is a deficient number, since it is larger than the sum of its proper divisors (31984099).

159920465 is an equidigital number, since it uses as much as digits as its factorization.

159920465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31984098.

The product of its (nonzero) digits is 97200, while the sum is 41.

The square root of 159920465 is about 12645.9663529522. The cubic root of 159920465 is about 542.7935537408.

The spelling of 159920465 in words is "one hundred fifty-nine million, nine hundred twenty thousand, four hundred sixty-five".