125651993 has 2 divisors, whose sum is σ = 125651994. Its totient is φ = 125651992.

The previous prime is 125651987. The next prime is 125652017. The reversal of 125651993 is 399156521.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86062729 + 39589264 = 9277^2 + 6292^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125651993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 125651993.

It is not a weakly prime, because it can be changed into another prime (125651893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62825996 + 62825997.

It is an arithmetic number, because the mean of its divisors is an integer number (62825997).

Almost surely, 2^125651993 is an apocalyptic number.

It is an amenable number.

125651993 is a deficient number, since it is larger than the sum of its proper divisors (1).

125651993 is an equidigital number, since it uses as much as digits as its factorization.

125651993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72900, while the sum is 41.

The square root of 125651993 is about 11209.4599780721. The cubic root of 125651993 is about 500.8678169162.

The spelling of 125651993 in words is "one hundred twenty-five million, six hundred fifty-one thousand, nine hundred ninety-three".