80672409 has 16 divisors (see below), whose sum is σ = 120282240. Its totient is φ = 53436240.

The previous prime is 80672399. The next prime is 80672443. The reversal of 80672409 is 90427608.

It is not a de Polignac number, because 80672409 - 2⁴ = 80672393 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (80672909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5277 + ... + 13754.

It is an arithmetic number, because the mean of its divisors is an integer number (7517640).

Almost surely, 2^80672409 is an apocalyptic number.

It is an amenable number.

80672409 is a deficient number, since it is larger than the sum of its proper divisors (39609831).

80672409 is a wasteful number, since it uses less digits than its factorization.

80672409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19197 (or 19191 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 80672409 is about 8981.7820614842. The cubic root of 80672409 is about 432.0907891746.

The spelling of 80672409 in words is "eighty million, six hundred seventy-two thousand, four hundred nine".