72159887 has 2 divisors, whose sum is σ = 72159888. Its totient is φ = 72159886.

The previous prime is 72159863. The next prime is 72159931. The reversal of 72159887 is 78895127.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72159887 - 2⁶ = 72159823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72159187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36079943 + 36079944.

It is an arithmetic number, because the mean of its divisors is an integer number (36079944).

Almost surely, 2^72159887 is an apocalyptic number.

72159887 is a deficient number, since it is larger than the sum of its proper divisors (1).

72159887 is an equidigital number, since it uses as much as digits as its factorization.

72159887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 282240, while the sum is 47.

The square root of 72159887 is about 8494.6975814328. The cubic root of 72159887 is about 416.3244798744.

The spelling of 72159887 in words is "seventy-two million, one hundred fifty-nine thousand, eight hundred eighty-seven".