72772831 has 4 divisors (see below), whose sum is σ = 76603000. Its totient is φ = 68942664.

The previous prime is 72772807. The next prime is 72772849. The reversal of 72772831 is 13827727.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13827727 = 1087 ⋅12721.

It is a cyclic number.

It is not a de Polignac number, because 72772831 - 2⁹ = 72772319 is a prime.

It is a super-2 number, since 2×72772831² = 10591769863509122, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72772031) 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, 1915056 + ... + 1915093.

It is an arithmetic number, because the mean of its divisors is an integer number (19150750).

Almost surely, 2^72772831 is an apocalyptic number.

72772831 is a deficient number, since it is larger than the sum of its proper divisors (3830169).

72772831 is a wasteful number, since it uses less digits than its factorization.

72772831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3830168.

The product of its digits is 32928, while the sum is 37.

The square root of 72772831 is about 8530.6993265500. The cubic root of 72772831 is about 417.4999457373.

The spelling of 72772831 in words is "seventy-two million, seven hundred seventy-two thousand, eight hundred thirty-one".