125603993 has 2 divisors, whose sum is σ = 125603994. Its totient is φ = 125603992.

The previous prime is 125603987. The next prime is 125604013. The reversal of 125603993 is 399306521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122058304 + 3545689 = 11048^2 + 1883^2 .

It is an emirp because it is prime and its reverse (399306521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 125603993 - 2¹² = 125599897 is a prime.

It is not a weakly prime, because it can be changed into another prime (125603963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62801996 + 62801997.

It is an arithmetic number, because the mean of its divisors is an integer number (62801997).

Almost surely, 2^125603993 is an apocalyptic number.

It is an amenable number.

125603993 is a deficient number, since it is larger than the sum of its proper divisors (1).

125603993 is an equidigital number, since it uses as much as digits as its factorization.

125603993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43740, while the sum is 38.

The square root of 125603993 is about 11207.3187248333. The cubic root of 125603993 is about 500.8040303773.

The spelling of 125603993 in words is "one hundred twenty-five million, six hundred three thousand, nine hundred ninety-three".