79857825 has 12 divisors (see below), whose sum is σ = 132031728. Its totient is φ = 42590800.

The previous prime is 79857821. The next prime is 79857847. The reversal of 79857825 is 52875897.

It is not a de Polignac number, because 79857825 - 2² = 79857821 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (79857821) 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, 532311 + ... + 532460.

It is an arithmetic number, because the mean of its divisors is an integer number (11002644).

Almost surely, 2^79857825 is an apocalyptic number.

79857825 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

79857825 is a deficient number, since it is larger than the sum of its proper divisors (52173903).

79857825 is a wasteful number, since it uses less digits than its factorization.

79857825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1064784 (or 1064779 counting only the distinct ones).

The product of its digits is 1411200, while the sum is 51.

The square root of 79857825 is about 8936.3205515469. The cubic root of 79857825 is about 430.6315310178.

The spelling of 79857825 in words is "seventy-nine million, eight hundred fifty-seven thousand, eight hundred twenty-five".