72823631 has 4 divisors (see below), whose sum is σ = 77107392. Its totient is φ = 68539872.

The previous prime is 72823613. The next prime is 72823649. The reversal of 72823631 is 13632827.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (72823613) and next prime (72823649).

It is a cyclic number.

It is not a de Polignac number, because 72823631 - 2⁶ = 72823567 is a prime.

It is a super-2 number, since 2×72823631² = 10606562464048322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72823661) 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, 2141855 + ... + 2141888.

It is an arithmetic number, because the mean of its divisors is an integer number (19276848).

Almost surely, 2^72823631 is an apocalyptic number.

72823631 is a deficient number, since it is larger than the sum of its proper divisors (4283761).

72823631 is a wasteful number, since it uses less digits than its factorization.

72823631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4283760.

The product of its digits is 12096, while the sum is 32.

The square root of 72823631 is about 8533.6762886812. The cubic root of 72823631 is about 417.5970701897.

The spelling of 72823631 in words is "seventy-two million, eight hundred twenty-three thousand, six hundred thirty-one".