72772787 has 4 divisors (see below), whose sum is σ = 73859016. Its totient is φ = 71686560.

The previous prime is 72772771. The next prime is 72772807. The reversal of 72772787 is 78727727.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78727727 = 13 ⋅6055979.

It is a cyclic number.

It is not a de Polignac number, because 72772787 - 2⁴ = 72772771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72772757) 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, 543014 + ... + 543147.

It is an arithmetic number, because the mean of its divisors is an integer number (18464754).

Almost surely, 2^72772787 is an apocalyptic number.

72772787 is a deficient number, since it is larger than the sum of its proper divisors (1086229).

72772787 is a wasteful number, since it uses less digits than its factorization.

72772787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1086228.

The product of its digits is 537824, while the sum is 47.

The square root of 72772787 is about 8530.6967476285. The cubic root of 72772787 is about 417.4998615941.

The spelling of 72772787 in words is "seventy-two million, seven hundred seventy-two thousand, seven hundred eighty-seven".