72827779 has 12 divisors (see below), whose sum is σ = 81390744. Its totient is φ = 64930752.

The previous prime is 72827749. The next prime is 72827789. The reversal of 72827779 is 97772827.

It is not a de Polignac number, because 72827779 - 2¹⁵ = 72795011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72827719) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 204 + ... + 12070.

It is an arithmetic number, because the mean of its divisors is an integer number (6782562).

Almost surely, 2^72827779 is an apocalyptic number.

72827779 is a deficient number, since it is larger than the sum of its proper divisors (8562965).

72827779 is a wasteful number, since it uses less digits than its factorization.

72827779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11922 (or 11903 counting only the distinct ones).

The product of its digits is 691488, while the sum is 49.

The square root of 72827779 is about 8533.9193223278. The cubic root of 72827779 is about 417.6049987505.

The spelling of 72827779 in words is "seventy-two million, eight hundred twenty-seven thousand, seven hundred seventy-nine".