42667831 has 2 divisors, whose sum is σ = 42667832. Its totient is φ = 42667830.

The previous prime is 42667819. The next prime is 42667837. The reversal of 42667831 is 13876624.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42667831 - 2⁵ = 42667799 is a prime.

It is a super-2 number, since 2×42667831² = 3641087604489122, which contains 22 as substring.

It is equal to p_2585737 and since 42667831 and 2585737 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42667837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21333915 + 21333916.

It is an arithmetic number, because the mean of its divisors is an integer number (21333916).

Almost surely, 2^42667831 is an apocalyptic number.

42667831 is a deficient number, since it is larger than the sum of its proper divisors (1).

42667831 is an equidigital number, since it uses as much as digits as its factorization.

42667831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 37.

The square root of 42667831 is about 6532.0617725187. The cubic root of 42667831 is about 349.4353644245.

The spelling of 42667831 in words is "forty-two million, six hundred sixty-seven thousand, eight hundred thirty-one".