125889091 has 2 divisors, whose sum is σ = 125889092. Its totient is φ = 125889090.

The previous prime is 125889083. The next prime is 125889139. The reversal of 125889091 is 190988521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 125889091 - 2³ = 125889083 is a prime.

It is not a weakly prime, because it can be changed into another prime (125889061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62944545 + 62944546.

It is an arithmetic number, because the mean of its divisors is an integer number (62944546).

Almost surely, 2^125889091 is an apocalyptic number.

125889091 is a deficient number, since it is larger than the sum of its proper divisors (1).

125889091 is an equidigital number, since it uses as much as digits as its factorization.

125889091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 43.

The square root of 125889091 is about 11220.0307931841. The cubic root of 125889091 is about 501.1826551149.

The spelling of 125889091 in words is "one hundred twenty-five million, eight hundred eighty-nine thousand, ninety-one".