72727987 has 2 divisors, whose sum is σ = 72727988. Its totient is φ = 72727986.

The previous prime is 72727951. The next prime is 72728011. The reversal of 72727987 is 78972727.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72727987 - 2⁷ = 72727859 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72727987.

It is not a weakly prime, because it can be changed into another prime (72727937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36363993 + 36363994.

It is an arithmetic number, because the mean of its divisors is an integer number (36363994).

Almost surely, 2^72727987 is an apocalyptic number.

72727987 is a deficient number, since it is larger than the sum of its proper divisors (1).

72727987 is an equidigital number, since it uses as much as digits as its factorization.

72727987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 691488, while the sum is 49.

The square root of 72727987 is about 8528.0705320723. The cubic root of 72727987 is about 417.4141709853.

The spelling of 72727987 in words is "seventy-two million, seven hundred twenty-seven thousand, nine hundred eighty-seven".