920616161 has 4 divisors (see below), whose sum is σ = 920739012. Its totient is φ = 920493312.

The previous prime is 920616157. The next prime is 920616187. The reversal of 920616161 is 161616029.

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 183765136 + 736851025 = 13556^2 + 27145^2 .

It is a cyclic number.

It is not a de Polignac number, because 920616161 - 2² = 920616157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (920616121) 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, 49400 + ... + 65433.

It is an arithmetic number, because the mean of its divisors is an integer number (230184753).

Almost surely, 2^920616161 is an apocalyptic number.

It is an amenable number.

920616161 is a deficient number, since it is larger than the sum of its proper divisors (122851).

920616161 is a wasteful number, since it uses less digits than its factorization.

920616161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122850.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 920616161 is about 30341.6571894153. The cubic root of 920616161 is about 972.8059050479.

The spelling of 920616161 in words is "nine hundred twenty million, six hundred sixteen thousand, one hundred sixty-one".