80772913 has 4 divisors (see below), whose sum is σ = 86986228. Its totient is φ = 74559600.

The previous prime is 80772907. The next prime is 80772919. The reversal of 80772913 is 31927708.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (80772907) and next prime (80772919).

It can be written as a sum of positive squares in 2 ways, for example, as 18173169 + 62599744 = 4263^2 + 7912^2 .

It is a cyclic number.

It is not a de Polignac number, because 80772913 - 2¹³ = 80764721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80772919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3106638 + ... + 3106663.

It is an arithmetic number, because the mean of its divisors is an integer number (21746557).

Almost surely, 2^80772913 is an apocalyptic number.

It is an amenable number.

80772913 is a deficient number, since it is larger than the sum of its proper divisors (6213315).

80772913 is a wasteful number, since it uses less digits than its factorization.

80772913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6213314.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 80772913 is about 8987.3752008025. The cubic root of 80772913 is about 432.2701517412.

The spelling of 80772913 in words is "eighty million, seven hundred seventy-two thousand, nine hundred thirteen".