80857937 has 4 divisors (see below), whose sum is σ = 80882100. Its totient is φ = 80833776.

The previous prime is 80857927. The next prime is 80857957. The reversal of 80857937 is 73975808.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 53567761 + 27290176 = 7319^2 + 5224^2 .

It is a cyclic number.

It is not a de Polignac number, because 80857937 - 2⁴ = 80857921 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 80857891 and 80857900.

It is not an unprimeable number, because it can be changed into a prime (80857927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6062 + ... + 14087.

It is an arithmetic number, because the mean of its divisors is an integer number (20220525).

Almost surely, 2^80857937 is an apocalyptic number.

It is an amenable number.

80857937 is a deficient number, since it is larger than the sum of its proper divisors (24163).

80857937 is a wasteful number, since it uses less digits than its factorization.

80857937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24162.

The product of its (nonzero) digits is 423360, while the sum is 47.

The square root of 80857937 is about 8992.1041475285. The cubic root of 80857937 is about 432.4217720789.

The spelling of 80857937 in words is "eighty million, eight hundred fifty-seven thousand, nine hundred thirty-seven".