126503779 has 2 divisors, whose sum is σ = 126503780. Its totient is φ = 126503778.

The previous prime is 126503759. The next prime is 126503791. The reversal of 126503779 is 977305621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 126503779 - 2⁷ = 126503651 is a prime.

It is a super-2 number, since 2×126503779² = 32006412202561682, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (126503719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63251889 + 63251890.

It is an arithmetic number, because the mean of its divisors is an integer number (63251890).

Almost surely, 2^126503779 is an apocalyptic number.

126503779 is a deficient number, since it is larger than the sum of its proper divisors (1).

126503779 is an equidigital number, since it uses as much as digits as its factorization.

126503779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 79380, while the sum is 40.

The square root of 126503779 is about 11247.3898749888. The cubic root of 126503779 is about 501.9970516168.

The spelling of 126503779 in words is "one hundred twenty-six million, five hundred three thousand, seven hundred seventy-nine".