107557991 has 2 divisors, whose sum is σ = 107557992. Its totient is φ = 107557990.

The previous prime is 107557987. The next prime is 107558023. The reversal of 107557991 is 199755701.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 107557991 - 2² = 107557987 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (107551991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53778995 + 53778996.

It is an arithmetic number, because the mean of its divisors is an integer number (53778996).

Almost surely, 2^107557991 is an apocalyptic number.

107557991 is a deficient number, since it is larger than the sum of its proper divisors (1).

107557991 is an equidigital number, since it uses as much as digits as its factorization.

107557991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 99225, while the sum is 44.

The square root of 107557991 is about 10371.0168739618. The cubic root of 107557991 is about 475.5697554640.

The spelling of 107557991 in words is "one hundred seven million, five hundred fifty-seven thousand, nine hundred ninety-one".