109091131 has 2 divisors, whose sum is σ = 109091132. Its totient is φ = 109091130.

The previous prime is 109091063. The next prime is 109091189. The reversal of 109091131 is 131190901.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-109091131 is a prime.

It is a super-2 number, since 2×109091131² = 23801749725718322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 109091096 and 109091105.

It is not a weakly prime, because it can be changed into another prime (109091831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54545565 + 54545566.

It is an arithmetic number, because the mean of its divisors is an integer number (54545566).

Almost surely, 2^109091131 is an apocalyptic number.

109091131 is a deficient number, since it is larger than the sum of its proper divisors (1).

109091131 is an equidigital number, since it uses as much as digits as its factorization.

109091131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 243, while the sum is 25.

The square root of 109091131 is about 10444.6699804254. The cubic root of 109091131 is about 477.8187063049.

The spelling of 109091131 in words is "one hundred nine million, ninety-one thousand, one hundred thirty-one".