72080881 has 2 divisors, whose sum is σ = 72080882. Its totient is φ = 72080880.

The previous prime is 72080861. The next prime is 72080887. The reversal of 72080881 is 18808027.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38626225 + 33454656 = 6215^2 + 5784^2 .

It is a cyclic number.

It is not a de Polignac number, because 72080881 - 2⁵ = 72080849 is a prime.

It is a super-2 number, since 2×72080881² = 10391306811472322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (72080887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36040440 + 36040441.

It is an arithmetic number, because the mean of its divisors is an integer number (36040441).

Almost surely, 2^72080881 is an apocalyptic number.

It is an amenable number.

72080881 is a deficient number, since it is larger than the sum of its proper divisors (1).

72080881 is an equidigital number, since it uses as much as digits as its factorization.

72080881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7168, while the sum is 34.

The square root of 72080881 is about 8490.0459951640. The cubic root of 72080881 is about 416.1724834085.

The spelling of 72080881 in words is "seventy-two million, eighty thousand, eight hundred eighty-one".