125680091 has 2 divisors, whose sum is σ = 125680092. Its totient is φ = 125680090.

The previous prime is 125680063. The next prime is 125680097. The reversal of 125680091 is 190086521.

It is a strong prime.

It is an emirp because it is prime and its reverse (190086521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 125680091 - 2¹⁸ = 125417947 is a prime.

It is not a weakly prime, because it can be changed into another prime (125680097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62840045 + 62840046.

It is an arithmetic number, because the mean of its divisors is an integer number (62840046).

Almost surely, 2^125680091 is an apocalyptic number.

125680091 is a deficient number, since it is larger than the sum of its proper divisors (1).

125680091 is an equidigital number, since it uses as much as digits as its factorization.

125680091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 125680091 is about 11210.7132244117. The cubic root of 125680091 is about 500.9051484239.

The spelling of 125680091 in words is "one hundred twenty-five million, six hundred eighty thousand, ninety-one".