80899877 has 2 divisors, whose sum is σ = 80899878. Its totient is φ = 80899876.

The previous prime is 80899873. The next prime is 80899913. The reversal of 80899877 is 77899808.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66161956 + 14737921 = 8134^2 + 3839^2 .

It is a cyclic number.

It is not a de Polignac number, because 80899877 - 2² = 80899873 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80899873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40449938 + 40449939.

It is an arithmetic number, because the mean of its divisors is an integer number (40449939).

Almost surely, 2^80899877 is an apocalyptic number.

It is an amenable number.

80899877 is a deficient number, since it is larger than the sum of its proper divisors (1).

80899877 is an equidigital number, since it uses as much as digits as its factorization.

80899877 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2032128, while the sum is 56.

The square root of 80899877 is about 8994.4358911496. The cubic root of 80899877 is about 432.4965230767.

The spelling of 80899877 in words is "eighty million, eight hundred ninety-nine thousand, eight hundred seventy-seven".