399109441 has 4 divisors (see below), whose sum is σ = 399416112. Its totient is φ = 398802772.

The previous prime is 399109433. The next prime is 399109471. The reversal of 399109441 is 144901993.

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.

It is a cyclic number.

It is not a de Polignac number, because 399109441 - 2³ = 399109433 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 399109394 and 399109403.

It is not an unprimeable number, because it can be changed into a prime (399109411) 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, 151375 + ... + 153988.

It is an arithmetic number, because the mean of its divisors is an integer number (99854028).

Almost surely, 2^399109441 is an apocalyptic number.

It is an amenable number.

399109441 is a deficient number, since it is larger than the sum of its proper divisors (306671).

399109441 is a wasteful number, since it uses less digits than its factorization.

399109441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306670.

The product of its (nonzero) digits is 34992, while the sum is 40.

The square root of 399109441 is about 19977.7236190713. The cubic root of 399109441 is about 736.2590855202.

The spelling of 399109441 in words is "three hundred ninety-nine million, one hundred nine thousand, four hundred forty-one".