42961931 has 2 divisors, whose sum is σ = 42961932. Its totient is φ = 42961930.

The previous prime is 42961883. The next prime is 42961949. The reversal of 42961931 is 13916924.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42961931 - 2¹⁴ = 42945547 is a prime.

It is a super-2 number, since 2×42961931² = 3691455030497522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 42961891 and 42961900.

It is not a weakly prime, because it can be changed into another prime (42961231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21480965 + 21480966.

It is an arithmetic number, because the mean of its divisors is an integer number (21480966).

Almost surely, 2^42961931 is an apocalyptic number.

42961931 is a deficient number, since it is larger than the sum of its proper divisors (1).

42961931 is an equidigital number, since it uses as much as digits as its factorization.

42961931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 35.

The square root of 42961931 is about 6554.5351475143. The cubic root of 42961931 is about 350.2363872487.

The spelling of 42961931 in words is "forty-two million, nine hundred sixty-one thousand, nine hundred thirty-one".