42873931 has 2 divisors, whose sum is σ = 42873932. Its totient is φ = 42873930.

The previous prime is 42873923. The next prime is 42873947. The reversal of 42873931 is 13937824.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42873931 - 2³ = 42873923 is a prime.

It is a super-2 number, since 2×42873931² = 3676347918785522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42873431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21436965 + 21436966.

It is an arithmetic number, because the mean of its divisors is an integer number (21436966).

Almost surely, 2^42873931 is an apocalyptic number.

42873931 is a deficient number, since it is larger than the sum of its proper divisors (1).

42873931 is an equidigital number, since it uses as much as digits as its factorization.

42873931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 37.

The square root of 42873931 is about 6547.8187971263. The cubic root of 42873931 is about 349.9970911323.

The spelling of 42873931 in words is "forty-two million, eight hundred seventy-three thousand, nine hundred thirty-one".