399952963 has 4 divisors (see below), whose sum is σ = 400320648. Its totient is φ = 399585280.

The previous prime is 399952951. The next prime is 399952981. The reversal of 399952963 is 369259993.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-399952963 is a prime.

It is a super-2 number, since 2×399952963² = 319924745224958738, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (399950963) 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, 182206 + ... + 184387.

It is an arithmetic number, because the mean of its divisors is an integer number (100080162).

Almost surely, 2^399952963 is an apocalyptic number.

399952963 is a deficient number, since it is larger than the sum of its proper divisors (367685).

399952963 is a wasteful number, since it uses less digits than its factorization.

399952963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367684.

The product of its digits is 3542940, while the sum is 55.

The square root of 399952963 is about 19998.8240404280. The cubic root of 399952963 is about 736.7774176310. Note that the first 3 decimals are identical.

The spelling of 399952963 in words is "three hundred ninety-nine million, nine hundred fifty-two thousand, nine hundred sixty-three".