72776377 has 2 divisors, whose sum is σ = 72776378. Its totient is φ = 72776376.

The previous prime is 72776359. The next prime is 72776381. The reversal of 72776377 is 77367727.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70073641 + 2702736 = 8371^2 + 1644^2 .

It is a cyclic number.

It is not a de Polignac number, because 72776377 - 2²³ = 64387769 is a prime.

It is a super-2 number, since 2×72776377² = 10592802098492258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (72776387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36388188 + 36388189.

It is an arithmetic number, because the mean of its divisors is an integer number (36388189).

Almost surely, 2^72776377 is an apocalyptic number.

It is an amenable number.

72776377 is a deficient number, since it is larger than the sum of its proper divisors (1).

72776377 is an equidigital number, since it uses as much as digits as its factorization.

72776377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 605052, while the sum is 46.

The square root of 72776377 is about 8530.9071616095. The cubic root of 72776377 is about 417.5067267971.

It can be divided in two parts, 72776 and 377, that added together give a triangular number (73153 = T₃₈₂).

The spelling of 72776377 in words is "seventy-two million, seven hundred seventy-six thousand, three hundred seventy-seven".