979999951 has 6 divisors (see below), whose sum is σ = 1140000000. Its totient is φ = 839999916.

The previous prime is 979999913. The next prime is 979999957. The reversal of 979999951 is 159999979.

It is not a de Polignac number, because 979999951 - 2²³ = 971611343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (979999957) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9999951 + ... + 10000048.

It is an arithmetic number, because the mean of its divisors is an integer number (190000000).

Almost surely, 2^979999951 is an apocalyptic number.

979999951 is a deficient number, since it is larger than the sum of its proper divisors (160000049).

979999951 is a wasteful number, since it uses less digits than its factorization.

979999951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20000013 (or 20000006 counting only the distinct ones).

The product of its digits is 18600435, while the sum is 67.

The square root of 979999951 is about 31304.9509023733. The cubic root of 979999951 is about 993.2883718245.

The spelling of 979999951 in words is "nine hundred seventy-nine million, nine hundred ninety-nine thousand, nine hundred fifty-one".