9977965279 has 2 divisors, whose sum is σ = 9977965280. Its totient is φ = 9977965278.

The previous prime is 9977965211. The next prime is 9977965307. The reversal of 9977965279 is 9725697799.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9977965279 - 2²³ = 9969576671 is a prime.

It is a super-2 number, since 2×9977965279² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9977965379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4988982639 + 4988982640.

It is an arithmetic number, because the mean of its divisors is an integer number (4988982640).

Almost surely, 2^9977965279 is an apocalyptic number.

9977965279 is a deficient number, since it is larger than the sum of its proper divisors (1).

9977965279 is an equidigital number, since it uses as much as digits as its factorization.

9977965279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 135025380, while the sum is 70.

The square root of 9977965279 is about 99889.7656369260. The cubic root of 9977965279 is about 2152.8511140963.

The spelling of 9977965279 in words is "nine billion, nine hundred seventy-seven million, nine hundred sixty-five thousand, two hundred seventy-nine".