920842931 has 2 divisors, whose sum is σ = 920842932. Its totient is φ = 920842930.

The previous prime is 920842889. The next prime is 920842987. The reversal of 920842931 is 139248029.

It is a weak prime.

It is an emirp because it is prime and its reverse (139248029) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 920842931 - 2¹⁴ = 920826547 is a prime.

It is a super-2 number, since 2×920842931² = 1695903407145341522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (920842231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460421465 + 460421466.

It is an arithmetic number, because the mean of its divisors is an integer number (460421466).

Almost surely, 2^920842931 is an apocalyptic number.

920842931 is a deficient number, since it is larger than the sum of its proper divisors (1).

920842931 is an equidigital number, since it uses as much as digits as its factorization.

920842931 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 920842931 is about 30345.3939008872. The cubic root of 920842931 is about 972.8857736886.

The spelling of 920842931 in words is "nine hundred twenty million, eight hundred forty-two thousand, nine hundred thirty-one".