72547987 has 2 divisors, whose sum is σ = 72547988. Its totient is φ = 72547986.

The previous prime is 72547961. The next prime is 72548017. The reversal of 72547987 is 78974527.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72547987 - 2⁷ = 72547859 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72547987.

It is not a weakly prime, because it can be changed into another prime (72547907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36273993 + 36273994.

It is an arithmetic number, because the mean of its divisors is an integer number (36273994).

Almost surely, 2^72547987 is an apocalyptic number.

72547987 is a deficient number, since it is larger than the sum of its proper divisors (1).

72547987 is an equidigital number, since it uses as much as digits as its factorization.

72547987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 987840, while the sum is 49.

The square root of 72547987 is about 8517.5106105012. The cubic root of 72547987 is about 417.0695231881.

The spelling of 72547987 in words is "seventy-two million, five hundred forty-seven thousand, nine hundred eighty-seven".