920657 has 4 divisors (see below), whose sum is σ = 933696. Its totient is φ = 907620.

The previous prime is 920653. The next prime is 920677. The reversal of 920657 is 756029.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 756029 = 19 ⋅39791.

It is a cyclic number.

It is not a de Polignac number, because 920657 - 2² = 920653 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 920657.

It is not an unprimeable number, because it can be changed into a prime (920651) 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, 6413 + ... + 6554.

It is an arithmetic number, because the mean of its divisors is an integer number (233424).

2⁹²⁰⁶⁵⁷ is an apocalyptic number.

It is an amenable number.

920657 is a deficient number, since it is larger than the sum of its proper divisors (13039).

920657 is a wasteful number, since it uses less digits than its factorization.

920657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13038.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 920657 is about 959.5087284647. The cubic root of 920657 is about 97.2820289556.

The spelling of 920657 in words is "nine hundred twenty thousand, six hundred fifty-seven".