125199973 has 2 divisors, whose sum is σ = 125199974. Its totient is φ = 125199972.

The previous prime is 125199959. The next prime is 125200013. The reversal of 125199973 is 379991521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105822369 + 19377604 = 10287^2 + 4402^2 .

It is a cyclic number.

It is not a de Polignac number, because 125199973 - 2⁹ = 125199461 is a prime.

It is a nialpdrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125199923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62599986 + 62599987.

It is an arithmetic number, because the mean of its divisors is an integer number (62599987).

Almost surely, 2^125199973 is an apocalyptic number.

It is an amenable number.

125199973 is a deficient number, since it is larger than the sum of its proper divisors (1).

125199973 is an equidigital number, since it uses as much as digits as its factorization.

125199973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 153090, while the sum is 46.

The square root of 125199973 is about 11189.2793780475. The cubic root of 125199973 is about 500.2664886091.

The spelling of 125199973 in words is "one hundred twenty-five million, one hundred ninety-nine thousand, nine hundred seventy-three".