109949869 has 4 divisors (see below), whose sum is σ = 110815744. Its totient is φ = 109083996.

The previous prime is 109949843. The next prime is 109949891. The reversal of 109949869 is 968949901.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 968949901 = 17 ⋅56997053.

It is a cyclic number.

It is not a de Polignac number, because 109949869 - 2¹¹ = 109947821 is a prime.

It is a super-2 number, since 2×109949869² = 24177947386234322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109949809) 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, 432747 + ... + 433000.

It is an arithmetic number, because the mean of its divisors is an integer number (27703936).

Almost surely, 2^109949869 is an apocalyptic number.

It is an amenable number.

109949869 is a deficient number, since it is larger than the sum of its proper divisors (865875).

109949869 is an equidigital number, since it uses as much as digits as its factorization.

109949869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 865874.

The product of its (nonzero) digits is 1259712, while the sum is 55.

The square root of 109949869 is about 10485.6983076951. The cubic root of 109949869 is about 479.0691871708.

The spelling of 109949869 in words is "one hundred nine million, nine hundred forty-nine thousand, eight hundred sixty-nine".