424191931 has 2 divisors, whose sum is σ = 424191932. Its totient is φ = 424191930.

The previous prime is 424191923. The next prime is 424191953. The reversal of 424191931 is 139191424.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 424191931 - 2³ = 424191923 is a prime.

It is a super-2 number, since 2×424191931² = 359877588651017522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (424191991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212095965 + 212095966.

It is an arithmetic number, because the mean of its divisors is an integer number (212095966).

Almost surely, 2^424191931 is an apocalyptic number.

424191931 is a deficient number, since it is larger than the sum of its proper divisors (1).

424191931 is an equidigital number, since it uses as much as digits as its factorization.

424191931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 34.

The square root of 424191931 is about 20595.9202513508. The cubic root of 424191931 is about 751.3704902979.

The spelling of 424191931 in words is "four hundred twenty-four million, one hundred ninety-one thousand, nine hundred thirty-one".