126979393 has 2 divisors, whose sum is σ = 126979394. Its totient is φ = 126979392.

The previous prime is 126979357. The next prime is 126979397. The reversal of 126979393 is 393979621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90098064 + 36881329 = 9492^2 + 6073^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126979393 is a prime.

It is a super-2 number, since 2×126979393² = 32247532493296898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (126979397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63489696 + 63489697.

It is an arithmetic number, because the mean of its divisors is an integer number (63489697).

Almost surely, 2^126979393 is an apocalyptic number.

It is an amenable number.

126979393 is a deficient number, since it is larger than the sum of its proper divisors (1).

126979393 is an equidigital number, since it uses as much as digits as its factorization.

126979393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 551124, while the sum is 49.

The square root of 126979393 is about 11268.5133447141. The cubic root of 126979393 is about 502.6253812852.

The spelling of 126979393 in words is "one hundred twenty-six million, nine hundred seventy-nine thousand, three hundred ninety-three".