72773279 has 2 divisors, whose sum is σ = 72773280. Its totient is φ = 72773278.

The previous prime is 72773263. The next prime is 72773291. The reversal of 72773279 is 97237727.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72773279 - 2⁴ = 72773263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72773479) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36386639 + 36386640.

It is an arithmetic number, because the mean of its divisors is an integer number (36386640).

Almost surely, 2^72773279 is an apocalyptic number.

72773279 is a deficient number, since it is larger than the sum of its proper divisors (1).

72773279 is an equidigital number, since it uses as much as digits as its factorization.

72773279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 259308, while the sum is 44.

The square root of 72773279 is about 8530.7255846147. The cubic root of 72773279 is about 417.5008024654.

The spelling of 72773279 in words is "seventy-two million, seven hundred seventy-three thousand, two hundred seventy-nine".