72183813 has 16 divisors (see below), whose sum is σ = 107224320. Its totient is φ = 42888384.

The previous prime is 72183809. The next prime is 72183817. The reversal of 72183813 is 31838127.

It is an interprime number because it is at equal distance from previous prime (72183809) and next prime (72183817).

It is not a de Polignac number, because 72183813 - 2² = 72183809 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72183817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30781 + ... + 33042.

It is an arithmetic number, because the mean of its divisors is an integer number (6701520).

Almost surely, 2^72183813 is an apocalyptic number.

It is an amenable number.

72183813 is a deficient number, since it is larger than the sum of its proper divisors (35040507).

72183813 is a wasteful number, since it uses less digits than its factorization.

72183813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63868.

The product of its digits is 8064, while the sum is 33.

The square root of 72183813 is about 8496.1057549915. The cubic root of 72183813 is about 416.3704882557.

The spelling of 72183813 in words is "seventy-two million, one hundred eighty-three thousand, eight hundred thirteen".