399049963 has 4 divisors (see below), whose sum is σ = 429746128. Its totient is φ = 368353800.

The previous prime is 399049961. The next prime is 399049967. The reversal of 399049963 is 369940993.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 369940993 = 23 ⋅16084391.

It is a cyclic number.

It is not a de Polignac number, because 399049963 - 2¹ = 399049961 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 399049963.

It is not an unprimeable number, because it can be changed into a prime (399049961) 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, 15348063 + ... + 15348088.

It is an arithmetic number, because the mean of its divisors is an integer number (107436532).

Almost surely, 2^399049963 is an apocalyptic number.

399049963 is a deficient number, since it is larger than the sum of its proper divisors (30696165).

399049963 is a wasteful number, since it uses less digits than its factorization.

399049963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30696164.

The product of its (nonzero) digits is 1417176, while the sum is 52.

The square root of 399049963 is about 19976.2349555666. The cubic root of 399049963 is about 736.2225095932. Note that the first 3 decimals are identical.

The spelling of 399049963 in words is "three hundred ninety-nine million, forty-nine thousand, nine hundred sixty-three".