399074143 has 16 divisors (see below), whose sum is σ = 435002400. Its totient is φ = 363922560.

The previous prime is 399074141. The next prime is 399074183. The reversal of 399074143 is 341470993.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 399074143 - 2¹ = 399074141 is a prime.

It is a super-2 number, since 2×399074143² = 318520343222368898, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 399074096 and 399074105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399074141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 485673 + ... + 486493.

It is an arithmetic number, because the mean of its divisors is an integer number (27187650).

Almost surely, 2^399074143 is an apocalyptic number.

399074143 is a deficient number, since it is larger than the sum of its proper divisors (35928257).

399074143 is a wasteful number, since it uses less digits than its factorization.

399074143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1242.

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 399074143 is about 19976.8401655517. The cubic root of 399074143 is about 736.2373794945.

The spelling of 399074143 in words is "three hundred ninety-nine million, seventy-four thousand, one hundred forty-three".