42477931 has 2 divisors, whose sum is σ = 42477932. Its totient is φ = 42477930.

The previous prime is 42477889. The next prime is 42477947. The reversal of 42477931 is 13977424.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42477931 - 2⁹ = 42477419 is a prime.

It is a super-2 number, since 2×42477931² = 3608749244081522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42477991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21238965 + 21238966.

It is an arithmetic number, because the mean of its divisors is an integer number (21238966).

Almost surely, 2^42477931 is an apocalyptic number.

42477931 is a deficient number, since it is larger than the sum of its proper divisors (1).

42477931 is an equidigital number, since it uses as much as digits as its factorization.

42477931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42336, while the sum is 37.

The square root of 42477931 is about 6517.5095703804. The cubic root of 42477931 is about 348.9161874585.

The spelling of 42477931 in words is "forty-two million, four hundred seventy-seven thousand, nine hundred thirty-one".