72313187 has 2 divisors, whose sum is σ = 72313188. Its totient is φ = 72313186.

The previous prime is 72313151. The next prime is 72313247. The reversal of 72313187 is 78131327.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72313187 - 2¹² = 72309091 is a prime.

It is not a weakly prime, because it can be changed into another prime (72313687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36156593 + 36156594.

It is an arithmetic number, because the mean of its divisors is an integer number (36156594).

Almost surely, 2^72313187 is an apocalyptic number.

72313187 is a deficient number, since it is larger than the sum of its proper divisors (1).

72313187 is an equidigital number, since it uses as much as digits as its factorization.

72313187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7056, while the sum is 32.

The square root of 72313187 is about 8503.7160700484. The cubic root of 72313187 is about 416.6190913858.

It can be divided in two parts, 72313 and 187, that multiplied together give a palindrome (13522531).

The spelling of 72313187 in words is "seventy-two million, three hundred thirteen thousand, one hundred eighty-seven".