72272677 has 4 divisors (see below), whose sum is σ = 72751456. Its totient is φ = 71793900.

The previous prime is 72272657. The next prime is 72272737. The reversal of 72272677 is 77627227.

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: 77627227 = 41 ⋅1893347.

It is a cyclic number.

It is not a de Polignac number, because 72272677 - 2¹¹ = 72270629 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 (72272657) 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, 239163 + ... + 239464.

It is an arithmetic number, because the mean of its divisors is an integer number (18187864).

Almost surely, 2^72272677 is an apocalyptic number.

It is an amenable number.

72272677 is a deficient number, since it is larger than the sum of its proper divisors (478779).

72272677 is a wasteful number, since it uses less digits than its factorization.

72272677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478778.

The product of its digits is 115248, while the sum is 40.

The square root of 72272677 is about 8501.3338365224. Note that the first 3 decimals coincide. The cubic root of 72272677 is about 416.5412798891.

The spelling of 72272677 in words is "seventy-two million, two hundred seventy-two thousand, six hundred seventy-seven".