399993419 has 6 divisors (see below), whose sum is σ = 465298524. Its totient is φ = 342851460.

The previous prime is 399993401. The next prime is 399993469. The reversal of 399993419 is 914399993.

It is a happy number.

It is not a de Polignac number, because 399993419 - 2⁸ = 399993163 is a prime.

It is a super-2 number, since 2×399993419² = 319989470486619122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (399993469) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4081517 + ... + 4081614.

It is an arithmetic number, because the mean of its divisors is an integer number (77549754).

Almost surely, 2^399993419 is an apocalyptic number.

399993419 is a deficient number, since it is larger than the sum of its proper divisors (65305105).

399993419 is an equidigital number, since it uses as much as digits as its factorization.

399993419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8163145 (or 8163138 counting only the distinct ones).

The product of its digits is 2125764, while the sum is 56.

The square root of 399993419 is about 19999.8354743233. The cubic root of 399993419 is about 736.8022589374.

The spelling of 399993419 in words is "three hundred ninety-nine million, nine hundred ninety-three thousand, four hundred nineteen".