920312131 has 4 divisors (see below), whose sum is σ = 922509000. Its totient is φ = 918115264.

The previous prime is 920312093. The next prime is 920312143. The reversal of 920312131 is 131213029.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-920312131 is a prime.

It is a super-2 number, since 2×920312131² = 1693948836931522322, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a zygodrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (920312171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1097806 + ... + 1098643.

It is an arithmetic number, because the mean of its divisors is an integer number (230627250).

Almost surely, 2^920312131 is an apocalyptic number.

920312131 is a deficient number, since it is larger than the sum of its proper divisors (2196869).

920312131 is a wasteful number, since it uses less digits than its factorization.

920312131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2196868.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 920312131 is about 30336.6466670263. The cubic root of 920312131 is about 972.6988047688.

The spelling of 920312131 in words is "nine hundred twenty million, three hundred twelve thousand, one hundred thirty-one".