439870091 has 4 divisors (see below), whose sum is σ = 450099672. Its totient is φ = 429640512.

The previous prime is 439870069. The next prime is 439870103. The reversal of 439870091 is 190078934.

It is a happy number.

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 439870091 - 2⁶ = 439870027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (439870391) 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, 5114726 + ... + 5114811.

It is an arithmetic number, because the mean of its divisors is an integer number (112524918).

Almost surely, 2^439870091 is an apocalyptic number.

439870091 is a deficient number, since it is larger than the sum of its proper divisors (10229581).

439870091 is a wasteful number, since it uses less digits than its factorization.

439870091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10229580.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 439870091 is about 20973.0801505168. The cubic root of 439870091 is about 760.5156305795.

The spelling of 439870091 in words is "four hundred thirty-nine million, eight hundred seventy thousand, ninety-one".