399746467 has 4 divisors (see below), whose sum is σ = 405222520. Its totient is φ = 394270416.

The previous prime is 399746461. The next prime is 399746471. The reversal of 399746467 is 764647993.

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 399746467 - 2¹⁹ = 399222179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (399746461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2737917 + ... + 2738062.

It is an arithmetic number, because the mean of its divisors is an integer number (101305630).

Almost surely, 2^399746467 is an apocalyptic number.

399746467 is a deficient number, since it is larger than the sum of its proper divisors (5476053).

399746467 is an equidigital number, since it uses as much as digits as its factorization.

399746467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5476052.

The product of its digits is 6858432, while the sum is 55.

The square root of 399746467 is about 19993.6606703225. The cubic root of 399746467 is about 736.6505962338.

The spelling of 399746467 in words is "three hundred ninety-nine million, seven hundred forty-six thousand, four hundred sixty-seven".