399549063 has 4 divisors (see below), whose sum is σ = 532732088. Its totient is φ = 266366040.

The previous prime is 399549061. The next prime is 399549067. The reversal of 399549063 is 360945993.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 399549063 - 2¹ = 399549061 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 (399549061) 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, 66591508 + ... + 66591513.

It is an arithmetic number, because the mean of its divisors is an integer number (133183022).

Almost surely, 2^399549063 is an apocalyptic number.

399549063 is a deficient number, since it is larger than the sum of its proper divisors (133183025).

399549063 is a wasteful number, since it uses less digits than its factorization.

399549063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133183024.

The product of its (nonzero) digits is 787320, while the sum is 48.

The square root of 399549063 is about 19988.7233959550. The cubic root of 399549063 is about 736.5293179322.

The spelling of 399549063 in words is "three hundred ninety-nine million, five hundred forty-nine thousand, sixty-three".