399241111 has 4 divisors (see below), whose sum is σ = 408525832. Its totient is φ = 389956392.

The previous prime is 399241097. The next prime is 399241121. The reversal of 399241111 is 111142993.

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 399241111 - 2⁵ = 399241079 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 (399241121) 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, 4642296 + ... + 4642381.

It is an arithmetic number, because the mean of its divisors is an integer number (102131458).

Almost surely, 2^399241111 is an apocalyptic number.

399241111 is a deficient number, since it is larger than the sum of its proper divisors (9284721).

399241111 is an equidigital number, since it uses as much as digits as its factorization.

399241111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9284720.

The product of its digits is 1944, while the sum is 31.

The square root of 399241111 is about 19981.0187678206. The cubic root of 399241111 is about 736.3400429093.

The spelling of 399241111 in words is "three hundred ninety-nine million, two hundred forty-one thousand, one hundred eleven".