80857971 has 6 divisors (see below), whose sum is σ = 116794860. Its totient is φ = 53905308.

The previous prime is 80857957. The next prime is 80857981. The reversal of 80857971 is 17975808.

80857971 is a `hidden beast` number, since 8 + 0 + 8 + 579 + 71 = 666.

It is not a de Polignac number, because 80857971 - 2⁹ = 80857459 is a prime.

It is a super-2 number, since 2×80857971² = 13076022948473682, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (80857921) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4492101 + ... + 4492118.

It is an arithmetic number, because the mean of its divisors is an integer number (19465810).

Almost surely, 2^80857971 is an apocalyptic number.

80857971 is a deficient number, since it is larger than the sum of its proper divisors (35936889).

80857971 is a wasteful number, since it uses less digits than its factorization.

80857971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8984225 (or 8984222 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 45.

The square root of 80857971 is about 8992.1060380758. The cubic root of 80857971 is about 432.4218326886.

The spelling of 80857971 in words is "eighty million, eight hundred fifty-seven thousand, nine hundred seventy-one".