42723631 has 4 divisors (see below), whose sum is σ = 42784600. Its totient is φ = 42662664.

The previous prime is 42723623. The next prime is 42723643. The reversal of 42723631 is 13632724.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42723631 - 2³ = 42723623 is a prime.

It is a super-2 number, since 2×42723631² = 3650617291648322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42723631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42720631) 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, 29421 + ... + 30838.

It is an arithmetic number, because the mean of its divisors is an integer number (10696150).

Almost surely, 2^42723631 is an apocalyptic number.

42723631 is a deficient number, since it is larger than the sum of its proper divisors (60969).

42723631 is an equidigital number, since it uses as much as digits as its factorization.

42723631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60968.

The product of its digits is 6048, while the sum is 28.

The square root of 42723631 is about 6536.3316164344. The cubic root of 42723631 is about 349.5876258914.

The spelling of 42723631 in words is "forty-two million, seven hundred twenty-three thousand, six hundred thirty-one".