125399727031 has 2 divisors, whose sum is σ = 125399727032. Its totient is φ = 125399727030.

The previous prime is 125399727001. The next prime is 125399727067. The reversal of 125399727031 is 130727993521.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 125399727031 - 2³¹ = 123252243383 is a prime.

It is a super-2 number, since 2×125399727031² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125399727001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62699863515 + 62699863516.

It is an arithmetic number, because the mean of its divisors is an integer number (62699863516).

Almost surely, 2^125399727031 is an apocalyptic number.

125399727031 is a deficient number, since it is larger than the sum of its proper divisors (1).

125399727031 is an equidigital number, since it uses as much as digits as its factorization.

125399727031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 714420, while the sum is 49.

The spelling of 125399727031 in words is "one hundred twenty-five billion, three hundred ninety-nine million, seven hundred twenty-seven thousand, thirty-one".