80699391 has 12 divisors (see below), whose sum is σ = 123422832. Its totient is φ = 50634816.

The previous prime is 80699389. The next prime is 80699429. The reversal of 80699391 is 19399608.

It is not a de Polignac number, because 80699391 - 2¹ = 80699389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80699321) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 263571 + ... + 263876.

It is an arithmetic number, because the mean of its divisors is an integer number (10285236).

Almost surely, 2^80699391 is an apocalyptic number.

80699391 is a deficient number, since it is larger than the sum of its proper divisors (42723441).

80699391 is a wasteful number, since it uses less digits than its factorization.

80699391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527470 (or 527467 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The square root of 80699391 is about 8983.2839763641. The cubic root of 80699391 is about 432.1389567131.

The spelling of 80699391 in words is "eighty million, six hundred ninety-nine thousand, three hundred ninety-one".