72556147 has 2 divisors, whose sum is σ = 72556148. Its totient is φ = 72556146.

The previous prime is 72556129. The next prime is 72556157. The reversal of 72556147 is 74165527.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72556147 is a prime.

It is not a weakly prime, because it can be changed into another prime (72556157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36278073 + 36278074.

It is an arithmetic number, because the mean of its divisors is an integer number (36278074).

Almost surely, 2^72556147 is an apocalyptic number.

72556147 is a deficient number, since it is larger than the sum of its proper divisors (1).

72556147 is an equidigital number, since it uses as much as digits as its factorization.

72556147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58800, while the sum is 37.

The square root of 72556147 is about 8517.9896102308. The cubic root of 72556147 is about 417.0851595500.

The spelling of 72556147 in words is "seventy-two million, five hundred fifty-six thousand, one hundred forty-seven".