126915913 has 2 divisors, whose sum is σ = 126915914. Its totient is φ = 126915912.

The previous prime is 126915911. The next prime is 126915941. The reversal of 126915913 is 319519621.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71368704 + 55547209 = 8448^2 + 7453^2 .

It is a cyclic number.

It is not a de Polignac number, because 126915913 - 2¹ = 126915911 is a prime.

It is a super-2 number, since 2×126915913² = 32215297945247138, which contains 22 as substring.

Together with 126915911, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (126915911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63457956 + 63457957.

It is an arithmetic number, because the mean of its divisors is an integer number (63457957).

Almost surely, 2^126915913 is an apocalyptic number.

It is an amenable number.

126915913 is a deficient number, since it is larger than the sum of its proper divisors (1).

126915913 is an equidigital number, since it uses as much as digits as its factorization.

126915913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14580, while the sum is 37.

The square root of 126915913 is about 11265.6962945039. The cubic root of 126915913 is about 502.5416092208.

The spelling of 126915913 in words is "one hundred twenty-six million, nine hundred fifteen thousand, nine hundred thirteen".