72317587 has 2 divisors, whose sum is σ = 72317588. Its totient is φ = 72317586.

The previous prime is 72317569. The next prime is 72317603. The reversal of 72317587 is 78571327.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72317587 - 2²³ = 63928979 is a prime.

It is not a weakly prime, because it can be changed into another prime (72317087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36158793 + 36158794.

It is an arithmetic number, because the mean of its divisors is an integer number (36158794).

Almost surely, 2^72317587 is an apocalyptic number.

72317587 is a deficient number, since it is larger than the sum of its proper divisors (1).

72317587 is an equidigital number, since it uses as much as digits as its factorization.

72317587 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82320, while the sum is 40.

The square root of 72317587 is about 8503.9747765383. The cubic root of 72317587 is about 416.6275411440.

The spelling of 72317587 in words is "seventy-two million, three hundred seventeen thousand, five hundred eighty-seven".