126640933 has 2 divisors, whose sum is σ = 126640934. Its totient is φ = 126640932.

The previous prime is 126640907. The next prime is 126640937. The reversal of 126640933 is 339046621.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126495009 + 145924 = 11247^2 + 382^2 .

It is a cyclic number.

It is not a de Polignac number, because 126640933 - 2⁵ = 126640901 is a prime.

It is a super-2 number, since 2×126640933² = 32075851822220978, which contains 22 as substring.

It is equal to p_7198243 and since 126640933 and 7198243 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126640937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63320466 + 63320467.

It is an arithmetic number, because the mean of its divisors is an integer number (63320467).

Almost surely, 2^126640933 is an apocalyptic number.

It is an amenable number.

126640933 is a deficient number, since it is larger than the sum of its proper divisors (1).

126640933 is an equidigital number, since it uses as much as digits as its factorization.

126640933 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 34.

The square root of 126640933 is about 11253.4853712083. The cubic root of 126640933 is about 502.1784059781.

The spelling of 126640933 in words is "one hundred twenty-six million, six hundred forty thousand, nine hundred thirty-three".