125633999 has 2 divisors, whose sum is σ = 125634000. Its totient is φ = 125633998.

The previous prime is 125633987. The next prime is 125634007. The reversal of 125633999 is 999336521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 125633999 - 2⁴ = 125633983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125633939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62816999 + 62817000.

It is an arithmetic number, because the mean of its divisors is an integer number (62817000).

Almost surely, 2^125633999 is an apocalyptic number.

125633999 is a deficient number, since it is larger than the sum of its proper divisors (1).

125633999 is an equidigital number, since it uses as much as digits as its factorization.

125633999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 393660, while the sum is 47.

The square root of 125633999 is about 11208.6573236940. The cubic root of 125633999 is about 500.8439068411.

The spelling of 125633999 in words is "one hundred twenty-five million, six hundred thirty-three thousand, nine hundred ninety-nine".