179989057 has 4 divisors (see below), whose sum is σ = 184379076. Its totient is φ = 175599040.

The previous prime is 179989037. The next prime is 179989063. The reversal of 179989057 is 750989971.

It is a Cunningham number, because it is equal to 13416²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 750989971 = 61 ⋅12311311.

It can be written as a sum of positive squares in 2 ways, for example, as 8667136 + 171321921 = 2944^2 + 13089^2 .

It is a cyclic number.

It is not a de Polignac number, because 179989057 - 2⁷ = 179988929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 179988989 and 179989007.

It is not an unprimeable number, because it can be changed into a prime (179989037) 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, 2194948 + ... + 2195029.

It is an arithmetic number, because the mean of its divisors is an integer number (46094769).

Almost surely, 2^179989057 is an apocalyptic number.

It is an amenable number.

179989057 is a deficient number, since it is larger than the sum of its proper divisors (4390019).

179989057 is an equidigital number, since it uses as much as digits as its factorization.

179989057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4390018.

The product of its (nonzero) digits is 1428840, while the sum is 55.

The square root of 179989057 is about 13416.0000372689. Note that the first 4 decimals coincide. The cubic root of 179989057 is about 564.6101751442.

The spelling of 179989057 in words is "one hundred seventy-nine million, nine hundred eighty-nine thousand, fifty-seven".