72292277 has 2 divisors, whose sum is σ = 72292278. Its totient is φ = 72292276.

The previous prime is 72292201. The next prime is 72292309. The reversal of 72292277 is 77229227.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58461316 + 13830961 = 7646^2 + 3719^2 .

It is a cyclic number.

It is not a de Polignac number, because 72292277 - 2⁸ = 72292021 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72292277.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72295277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36146138 + 36146139.

It is an arithmetic number, because the mean of its divisors is an integer number (36146139).

Almost surely, 2^72292277 is an apocalyptic number.

It is an amenable number.

72292277 is a deficient number, since it is larger than the sum of its proper divisors (1).

72292277 is an equidigital number, since it uses as much as digits as its factorization.

72292277 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 49392, while the sum is 38.

The square root of 72292277 is about 8502.4865186603. The cubic root of 72292277 is about 416.5789311450.

The spelling of 72292277 in words is "seventy-two million, two hundred ninety-two thousand, two hundred seventy-seven".