72905311 has 2 divisors, whose sum is σ = 72905312. Its totient is φ = 72905310.

The previous prime is 72905303. The next prime is 72905317. The reversal of 72905311 is 11350927.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72905311 - 2³ = 72905303 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72905311.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72905317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36452655 + 36452656.

It is an arithmetic number, because the mean of its divisors is an integer number (36452656).

Almost surely, 2^72905311 is an apocalyptic number.

72905311 is a deficient number, since it is larger than the sum of its proper divisors (1).

72905311 is an equidigital number, since it uses as much as digits as its factorization.

72905311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 72905311 is about 8538.4606926542. The cubic root of 72905311 is about 417.7531394201.

The spelling of 72905311 in words is "seventy-two million, nine hundred five thousand, three hundred eleven".