42631717 has 4 divisors (see below), whose sum is σ = 42938560. Its totient is φ = 42324876.

The previous prime is 42631709. The next prime is 42631739. The reversal of 42631717 is 71713624.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42631717 - 2³ = 42631709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42631817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153213 + ... + 153490.

It is an arithmetic number, because the mean of its divisors is an integer number (10734640).

Almost surely, 2^42631717 is an apocalyptic number.

It is an amenable number.

42631717 is a deficient number, since it is larger than the sum of its proper divisors (306843).

42631717 is a wasteful number, since it uses less digits than its factorization.

42631717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306842.

The product of its digits is 7056, while the sum is 31.

The square root of 42631717 is about 6529.2968227827. The cubic root of 42631717 is about 349.3367493750.

The spelling of 42631717 in words is "forty-two million, six hundred thirty-one thousand, seven hundred seventeen".