399492463 has 4 divisors (see below), whose sum is σ = 403611040. Its totient is φ = 395373888.

The previous prime is 399492449. The next prime is 399492517. The reversal of 399492463 is 364294993.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 364294993 = 487 ⋅748039.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-399492463 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 (399492413) 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, 2059143 + ... + 2059336.

It is an arithmetic number, because the mean of its divisors is an integer number (100902760).

Almost surely, 2^399492463 is an apocalyptic number.

399492463 is a deficient number, since it is larger than the sum of its proper divisors (4118577).

399492463 is an equidigital number, since it uses as much as digits as its factorization.

399492463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4118576.

The product of its digits is 1259712, while the sum is 49.

The square root of 399492463 is about 19987.3075475413. The cubic root of 399492463 is about 736.4945374493.

The spelling of 399492463 in words is "three hundred ninety-nine million, four hundred ninety-two thousand, four hundred sixty-three".