72771073 has 4 divisors (see below), whose sum is σ = 72842688. Its totient is φ = 72699460.

The previous prime is 72771071. The next prime is 72771089. The reversal of 72771073 is 37017727.

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: 37017727 = 967 ⋅38281.

It is a cyclic number.

It is not a de Polignac number, because 72771073 - 2¹ = 72771071 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72771071) 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, 34261 + ... + 36322.

It is an arithmetic number, because the mean of its divisors is an integer number (18210672).

Almost surely, 2^72771073 is an apocalyptic number.

It is an amenable number.

72771073 is a deficient number, since it is larger than the sum of its proper divisors (71615).

72771073 is a wasteful number, since it uses less digits than its factorization.

72771073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71614.

The product of its (nonzero) digits is 14406, while the sum is 34.

The square root of 72771073 is about 8530.5962863097. The cubic root of 72771073 is about 417.4965838104.

The spelling of 72771073 in words is "seventy-two million, seven hundred seventy-one thousand, seventy-three".