9976979951 has 8 divisors (see below), whose sum is σ = 10477076064. Its totient is φ = 9482410080.

The previous prime is 9976979917. The next prime is 9976979963. The reversal of 9976979951 is 1599796799.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9976979951 - 2¹⁴ = 9976963567 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 (9976979251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1377860 + ... + 1385081.

It is an arithmetic number, because the mean of its divisors is an integer number (1309634508).

Almost surely, 2^9976979951 is an apocalyptic number.

9976979951 is a deficient number, since it is larger than the sum of its proper divisors (500096113).

9976979951 is a wasteful number, since it uses less digits than its factorization.

9976979951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2763121.

The product of its digits is 86802030, while the sum is 71.

The square root of 9976979951 is about 99884.8334383153. The cubic root of 9976979951 is about 2152.7802467985.

The spelling of 9976979951 in words is "nine billion, nine hundred seventy-six million, nine hundred seventy-nine thousand, nine hundred fifty-one".