920230931 has 4 divisors (see below), whose sum is σ = 924902352. Its totient is φ = 915559512.

The previous prime is 920230921. The next prime is 920230957. The reversal of 920230931 is 139032029.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 139032029 = 43 ⋅3233303.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-920230931 is a prime.

It is a super-2 number, since 2×920230931² = 1693649932738253522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 920230894 and 920230903.

It is not an unprimeable number, because it can be changed into a prime (920230921) 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, 2335415 + ... + 2335808.

It is an arithmetic number, because the mean of its divisors is an integer number (231225588).

Almost surely, 2^920230931 is an apocalyptic number.

920230931 is a deficient number, since it is larger than the sum of its proper divisors (4671421).

920230931 is a wasteful number, since it uses less digits than its factorization.

920230931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4671420.

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 920230931 is about 30335.3083221516. The cubic root of 920230931 is about 972.6701965523.

The spelling of 920230931 in words is "nine hundred twenty million, two hundred thirty thousand, nine hundred thirty-one".