125644889 has 2 divisors, whose sum is σ = 125644890. Its totient is φ = 125644888.

The previous prime is 125644861. The next prime is 125644901. The reversal of 125644889 is 988446521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 94731289 + 30913600 = 9733^2 + 5560^2 .

It is a cyclic number.

It is not a de Polignac number, because 125644889 - 2⁸ = 125644633 is a prime.

It is not a weakly prime, because it can be changed into another prime (125644289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62822444 + 62822445.

It is an arithmetic number, because the mean of its divisors is an integer number (62822445).

Almost surely, 2^125644889 is an apocalyptic number.

It is an amenable number.

125644889 is a deficient number, since it is larger than the sum of its proper divisors (1).

125644889 is an equidigital number, since it uses as much as digits as its factorization.

125644889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 552960, while the sum is 47.

The square root of 125644889 is about 11209.1430983818. The cubic root of 125644889 is about 500.8583775327.

The spelling of 125644889 in words is "one hundred twenty-five million, six hundred forty-four thousand, eight hundred eighty-nine".