125644199 has 2 divisors, whose sum is σ = 125644200. Its totient is φ = 125644198.

The previous prime is 125644177. The next prime is 125644243. The reversal of 125644199 is 991446521.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125644199 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125644109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62822099 + 62822100.

It is an arithmetic number, because the mean of its divisors is an integer number (62822100).

Almost surely, 2^125644199 is an apocalyptic number.

125644199 is a deficient number, since it is larger than the sum of its proper divisors (1).

125644199 is an equidigital number, since it uses as much as digits as its factorization.

125644199 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 41.

The square root of 125644199 is about 11209.1123198940. The cubic root of 125644199 is about 500.8574606818.

The spelling of 125644199 in words is "one hundred twenty-five million, six hundred forty-four thousand, one hundred ninety-nine".