109149431 has 2 divisors, whose sum is σ = 109149432. Its totient is φ = 109149430.

The previous prime is 109149389. The next prime is 109149449. The reversal of 109149431 is 134941901.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-109149431 is a prime.

It is a super-2 number, since 2×109149431² = 23827196575247522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109149461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54574715 + 54574716.

It is an arithmetic number, because the mean of its divisors is an integer number (54574716).

Almost surely, 2^109149431 is an apocalyptic number.

109149431 is a deficient number, since it is larger than the sum of its proper divisors (1).

109149431 is an equidigital number, since it uses as much as digits as its factorization.

109149431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 109149431 is about 10447.4605048308. The cubic root of 109149431 is about 477.9038090669.

The spelling of 109149431 in words is "one hundred nine million, one hundred forty-nine thousand, four hundred thirty-one".