80861247 has 10 divisors (see below), whose sum is σ = 120792848. Its totient is φ = 53907444.

The previous prime is 80861239. The next prime is 80861273. The reversal of 80861247 is 74216808.

It is not a de Polignac number, because 80861247 - 2³ = 80861239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80861227) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 499063 + ... + 499224.

Almost surely, 2^80861247 is an apocalyptic number.

80861247 is a deficient number, since it is larger than the sum of its proper divisors (39931601).

80861247 is an equidigital number, since it uses as much as digits as its factorization.

80861247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 998299 (or 998290 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 80861247 is about 8992.2881960044. The cubic root of 80861247 is about 432.4276725367.

The spelling of 80861247 in words is "eighty million, eight hundred sixty-one thousand, two hundred forty-seven".