109400999 has 4 divisors (see below), whose sum is σ = 111194520. Its totient is φ = 107607480.

The previous prime is 109400981. The next prime is 109401013. The reversal of 109400999 is 999004901.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 109400999 - 2⁸ = 109400743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109400909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 896669 + ... + 896790.

It is an arithmetic number, because the mean of its divisors is an integer number (27798630).

Almost surely, 2^109400999 is an apocalyptic number.

109400999 is a deficient number, since it is larger than the sum of its proper divisors (1793521).

109400999 is an equidigital number, since it uses as much as digits as its factorization.

109400999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1793520.

The product of its (nonzero) digits is 26244, while the sum is 41.

The square root of 109400999 is about 10459.4932477630. The cubic root of 109400999 is about 478.2706854894.

The spelling of 109400999 in words is "one hundred nine million, four hundred thousand, nine hundred ninety-nine".