72831901 has 4 divisors (see below), whose sum is σ = 74066400. Its totient is φ = 71597404.

The previous prime is 72831877. The next prime is 72831923. The reversal of 72831901 is 10913827.

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, and also an emirpimes, since its reverse is a distinct semiprime: 10913827 = 151 ⋅72277.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72831901 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 (72831931) 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, 617161 + ... + 617278.

It is an arithmetic number, because the mean of its divisors is an integer number (18516600).

Almost surely, 2^72831901 is an apocalyptic number.

It is an amenable number.

72831901 is a deficient number, since it is larger than the sum of its proper divisors (1234499).

72831901 is a wasteful number, since it uses less digits than its factorization.

72831901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1234498.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 72831901 is about 8534.1608257637. The cubic root of 72831901 is about 417.6128773162.

The spelling of 72831901 in words is "seventy-two million, eight hundred thirty-one thousand, nine hundred one".