2491701931 has 2 divisors, whose sum is σ = 2491701932. Its totient is φ = 2491701930.

The previous prime is 2491701899. The next prime is 2491701977. The reversal of 2491701931 is 1391071942.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2491701931 - 2⁵ = 2491701899 is a prime.

It is a super-2 number, since 2×2491701931² = 12417157025898257522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2491701991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1245850965 + 1245850966.

It is an arithmetic number, because the mean of its divisors is an integer number (1245850966).

Almost surely, 2^2491701931 is an apocalyptic number.

2491701931 is a deficient number, since it is larger than the sum of its proper divisors (1).

2491701931 is an equidigital number, since it uses as much as digits as its factorization.

2491701931 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 2491701931 is about 49916.9503375356. The cubic root of 2491701931 is about 1355.7055154998.

The spelling of 2491701931 in words is "two billion, four hundred ninety-one million, seven hundred one thousand, nine hundred thirty-one".