126664019 has 2 divisors, whose sum is σ = 126664020. Its totient is φ = 126664018.

The previous prime is 126664003. The next prime is 126664039. The reversal of 126664019 is 910466621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 126664019 - 2⁴ = 126664003 is a prime.

It is a super-2 number, since 2×126664019² = 32087547418464722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 126664019.

It is not a weakly prime, because it can be changed into another prime (126664039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63332009 + 63332010.

It is an arithmetic number, because the mean of its divisors is an integer number (63332010).

Almost surely, 2^126664019 is an apocalyptic number.

126664019 is a deficient number, since it is larger than the sum of its proper divisors (1).

126664019 is an equidigital number, since it uses as much as digits as its factorization.

126664019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 126664019 is about 11254.5110511297. The cubic root of 126664019 is about 502.2089189831.

The spelling of 126664019 in words is "one hundred twenty-six million, six hundred sixty-four thousand, nineteen".