979493855 has 4 divisors (see below), whose sum is σ = 1175392632. Its totient is φ = 783595080.

The previous prime is 979493843. The next prime is 979493857. The reversal of 979493855 is 558394979.

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

It is not a de Polignac number, because 979493855 - 2⁶ = 979493791 is a prime.

It is a super-2 number, since 2×979493855² = 1918816423965522050, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 979493794 and 979493803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (979493857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97949381 + ... + 97949390.

It is an arithmetic number, because the mean of its divisors is an integer number (293848158).

Almost surely, 2^979493855 is an apocalyptic number.

979493855 is a deficient number, since it is larger than the sum of its proper divisors (195898777).

979493855 is a wasteful number, since it uses less digits than its factorization.

979493855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195898776.

The product of its digits is 12247200, while the sum is 59.

The square root of 979493855 is about 31296.8665364442. The cubic root of 979493855 is about 993.1173562268.

The spelling of 979493855 in words is "nine hundred seventy-nine million, four hundred ninety-three thousand, eight hundred fifty-five".