126403913 has 2 divisors, whose sum is σ = 126403914. Its totient is φ = 126403912.

The previous prime is 126403897. The next prime is 126403973. The reversal of 126403913 is 319304621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87366409 + 39037504 = 9347^2 + 6248^2 .

It is a cyclic number.

It is not a de Polignac number, because 126403913 - 2⁴ = 126403897 is a prime.

It is not a weakly prime, because it can be changed into another prime (126403973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63201956 + 63201957.

It is an arithmetic number, because the mean of its divisors is an integer number (63201957).

Almost surely, 2^126403913 is an apocalyptic number.

It is an amenable number.

126403913 is a deficient number, since it is larger than the sum of its proper divisors (1).

126403913 is an equidigital number, since it uses as much as digits as its factorization.

126403913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 126403913 is about 11242.9494795627. The cubic root of 126403913 is about 501.8649195024.

The spelling of 126403913 in words is "one hundred twenty-six million, four hundred three thousand, nine hundred thirteen".