399015011 has 4 divisors (see below), whose sum is σ = 399695352. Its totient is φ = 398334672.

The previous prime is 399014989. The next prime is 399015013. The reversal of 399015011 is 110510993.

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 399015011 - 2¹⁴ = 398998627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (399015013) 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, 339290 + ... + 340463.

It is an arithmetic number, because the mean of its divisors is an integer number (99923838).

Almost surely, 2^399015011 is an apocalyptic number.

399015011 is a deficient number, since it is larger than the sum of its proper divisors (680341).

399015011 is an equidigital number, since it uses as much as digits as its factorization.

399015011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680340.

The product of its (nonzero) digits is 1215, while the sum is 29.

The square root of 399015011 is about 19975.3600968794. The cubic root of 399015011 is about 736.2010142059.

The spelling of 399015011 in words is "three hundred ninety-nine million, fifteen thousand, eleven".