109890431 has 8 divisors (see below), whose sum is σ = 132976800. Its totient is φ = 88651008.

The previous prime is 109890419. The next prime is 109890437. The reversal of 109890431 is 134098901.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 109890431 - 2¹⁸ = 109628287 is a prime.

It is a super-2 number, since 2×109890431² = 24151813650731522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 109890391 and 109890400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109890437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 461606 + ... + 461843.

It is an arithmetic number, because the mean of its divisors is an integer number (16622100).

Almost surely, 2^109890431 is an apocalyptic number.

109890431 is a deficient number, since it is larger than the sum of its proper divisors (23086369).

109890431 is an equidigital number, since it uses as much as digits as its factorization.

109890431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 923473.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 109890431 is about 10482.8636831736. The cubic root of 109890431 is about 478.9828446486.

The spelling of 109890431 in words is "one hundred nine million, eight hundred ninety thousand, four hundred thirty-one".