125663431 has 2 divisors, whose sum is σ = 125663432. Its totient is φ = 125663430.

The previous prime is 125663407. The next prime is 125663437. The reversal of 125663431 is 134366521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 125663431 - 2¹³ = 125655239 is a prime.

It is a super-2 number, since 2×125663431² = 31582595781383522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 125663393 and 125663402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125663437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62831715 + 62831716.

It is an arithmetic number, because the mean of its divisors is an integer number (62831716).

Almost surely, 2^125663431 is an apocalyptic number.

125663431 is a deficient number, since it is larger than the sum of its proper divisors (1).

125663431 is an equidigital number, since it uses as much as digits as its factorization.

125663431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 31.

The square root of 125663431 is about 11209.9701605312. The cubic root of 125663431 is about 500.8830143201.

The spelling of 125663431 in words is "one hundred twenty-five million, six hundred sixty-three thousand, four hundred thirty-one".