125399797 has 2 divisors, whose sum is σ = 125399798. Its totient is φ = 125399796.

The previous prime is 125399783. The next prime is 125399801. The reversal of 125399797 is 797993521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112338801 + 13060996 = 10599^2 + 3614^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125399797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125399717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62699898 + 62699899.

It is an arithmetic number, because the mean of its divisors is an integer number (62699899).

Almost surely, 2^125399797 is an apocalyptic number.

It is an amenable number.

125399797 is a deficient number, since it is larger than the sum of its proper divisors (1).

125399797 is an equidigital number, since it uses as much as digits as its factorization.

125399797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1071630, while the sum is 52.

The square root of 125399797 is about 11198.2050793866. The cubic root of 125399797 is about 500.5324953627.

The spelling of 125399797 in words is "one hundred twenty-five million, three hundred ninety-nine thousand, seven hundred ninety-seven".