399694541 has 8 divisors (see below), whose sum is σ = 404226720. Its totient is φ = 395177328.

The previous prime is 399694511. The next prime is 399694543. The reversal of 399694541 is 145496993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 399694541 - 2¹⁴ = 399678157 is a prime.

It is a super-2 number, since 2×399694541² = 319511452210401362, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 399694541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399694543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55115 + ... + 61943.

It is an arithmetic number, because the mean of its divisors is an integer number (50528340).

Almost surely, 2^399694541 is an apocalyptic number.

It is an amenable number.

399694541 is a deficient number, since it is larger than the sum of its proper divisors (4532179).

399694541 is a wasteful number, since it uses less digits than its factorization.

399694541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7483.

The product of its digits is 1049760, while the sum is 50.

The square root of 399694541 is about 19992.3620665493. The cubic root of 399694541 is about 736.6186985367.

The spelling of 399694541 in words is "three hundred ninety-nine million, six hundred ninety-four thousand, five hundred forty-one".