8133979457 has 2 divisors, whose sum is σ = 8133979458. Its totient is φ = 8133979456.

The previous prime is 8133979387. The next prime is 8133979507. The reversal of 8133979457 is 7549793318.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6360222001 + 1773757456 = 79751^2 + 42116^2 .

It is a cyclic number.

It is not a de Polignac number, because 8133979457 - 2¹⁴ = 8133963073 is a prime.

It is not a weakly prime, because it can be changed into another prime (8133979057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4066989728 + 4066989729.

It is an arithmetic number, because the mean of its divisors is an integer number (4066989729).

Almost surely, 2^8133979457 is an apocalyptic number.

It is an amenable number.

8133979457 is a deficient number, since it is larger than the sum of its proper divisors (1).

8133979457 is an equidigital number, since it uses as much as digits as its factorization.

8133979457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5715360, while the sum is 56.

The square root of 8133979457 is about 90188.5771980022. The cubic root of 8133979457 is about 2011.1032001553.

The spelling of 8133979457 in words is "eight billion, one hundred thirty-three million, nine hundred seventy-nine thousand, four hundred fifty-seven".