42693631 has 2 divisors, whose sum is σ = 42693632. Its totient is φ = 42693630.

The previous prime is 42693619. The next prime is 42693641. The reversal of 42693631 is 13639624.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42693631 - 2¹³ = 42685439 is a prime.

It is a super-2 number, since 2×42693631² = 3645492255928322, which contains 22 as substring.

It is equal to p_2587183 and since 42693631 and 2587183 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 (42693641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21346815 + 21346816.

It is an arithmetic number, because the mean of its divisors is an integer number (21346816).

Almost surely, 2^42693631 is an apocalyptic number.

42693631 is a deficient number, since it is larger than the sum of its proper divisors (1).

42693631 is an equidigital number, since it uses as much as digits as its factorization.

42693631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 34.

The square root of 42693631 is about 6534.0363482307. The cubic root of 42693631 is about 349.5057813770.

The spelling of 42693631 in words is "forty-two million, six hundred ninety-three thousand, six hundred thirty-one".