72183901 has 4 divisors (see below), whose sum is σ = 72246204. Its totient is φ = 72121600.

The previous prime is 72183899. The next prime is 72183931. The reversal of 72183901 is 10938127.

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

It can be written as a sum of positive squares in 2 ways, for example, as 29920900 + 42263001 = 5470^2 + 6501^2 .

It is a cyclic number.

It is not a de Polignac number, because 72183901 - 2¹ = 72183899 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 (72183931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29380 + ... + 31741.

It is an arithmetic number, because the mean of its divisors is an integer number (18061551).

Almost surely, 2^72183901 is an apocalyptic number.

It is an amenable number.

72183901 is a deficient number, since it is larger than the sum of its proper divisors (62303).

72183901 is a wasteful number, since it uses less digits than its factorization.

72183901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62302.

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

The square root of 72183901 is about 8496.1109338332. The cubic root of 72183901 is about 416.3706574561.

The spelling of 72183901 in words is "seventy-two million, one hundred eighty-three thousand, nine hundred one".