80621947 has 12 divisors (see below), whose sum is σ = 94347120. Its totient is φ = 67486608.

The previous prime is 80621941. The next prime is 80621977. The reversal of 80621947 is 74912608.

It is not a de Polignac number, because 80621947 - 2⁷ = 80621819 is a prime.

It is not an unprimeable number, because it can be changed into a prime (80621941) 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, 9829 + ... + 16057.

It is an arithmetic number, because the mean of its divisors is an integer number (7862260).

Almost surely, 2^80621947 is an apocalyptic number.

80621947 is a deficient number, since it is larger than the sum of its proper divisors (13725173).

80621947 is an equidigital number, since it uses as much as digits as its factorization.

80621947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6322 (or 6279 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 80621947 is about 8978.9724913266. The cubic root of 80621947 is about 432.0006769394. Note that the first 3 decimals are identical.

The spelling of 80621947 in words is "eighty million, six hundred twenty-one thousand, nine hundred forty-seven".