109997399 has 4 divisors (see below), whose sum is σ = 110143464. Its totient is φ = 109851336.

The previous prime is 109997387. The next prime is 109997401. The reversal of 109997399 is 993799901.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 993799901 = 4289 ⋅231709.

It is a cyclic number.

It is not a de Polignac number, because 109997399 - 2¹⁶ = 109931863 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 (109997359) 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, 71897 + ... + 73410.

It is an arithmetic number, because the mean of its divisors is an integer number (27535866).

Almost surely, 2^109997399 is an apocalyptic number.

109997399 is a deficient number, since it is larger than the sum of its proper divisors (146065).

109997399 is an equidigital number, since it uses as much as digits as its factorization.

109997399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146064.

The product of its (nonzero) digits is 1240029, while the sum is 56.

The square root of 109997399 is about 10487.9644831588. The cubic root of 109997399 is about 479.1382091665.

The spelling of 109997399 in words is "one hundred nine million, nine hundred ninety-seven thousand, three hundred ninety-nine".