109375056991 has 2 divisors, whose sum is σ = 109375056992. Its totient is φ = 109375056990.

The previous prime is 109375056941. The next prime is 109375057019. The reversal of 109375056991 is 199650573901.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 109375056991 - 2²⁷ = 109240839263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109375056941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54687528495 + 54687528496.

It is an arithmetic number, because the mean of its divisors is an integer number (54687528496).

Almost surely, 2^109375056991 is an apocalyptic number.

109375056991 is a deficient number, since it is larger than the sum of its proper divisors (1).

109375056991 is an equidigital number, since it uses as much as digits as its factorization.

109375056991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2296350, while the sum is 55.

The spelling of 109375056991 in words is "one hundred nine billion, three hundred seventy-five million, fifty-six thousand, nine hundred ninety-one".