72316901 has 4 divisors (see below), whose sum is σ = 72349632. Its totient is φ = 72284172.

The previous prime is 72316897. The next prime is 72316931. The reversal of 72316901 is 10961327.

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: 10961327 = 13 ⋅843179.

It is a cyclic number.

It is not a de Polignac number, because 72316901 - 2² = 72316897 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 (72316931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12791 + ... + 17556.

It is an arithmetic number, because the mean of its divisors is an integer number (18087408).

Almost surely, 2^72316901 is an apocalyptic number.

It is an amenable number.

72316901 is a deficient number, since it is larger than the sum of its proper divisors (32731).

72316901 is a wasteful number, since it uses less digits than its factorization.

72316901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32730.

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 72316901 is about 8503.9344423625. The cubic root of 72316901 is about 416.6262237724.

The spelling of 72316901 in words is "seventy-two million, three hundred sixteen thousand, nine hundred one".