399141993 has 32 divisors (see below), whose sum is σ = 566870400. Its totient is φ = 249406976.

The previous prime is 399141983. The next prime is 399142033.

399141993 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 399141993 - 2¹⁰ = 399140969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (399141913) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 492973 + ... + 493781.

It is an arithmetic number, because the mean of its divisors is an integer number (17714700).

Almost surely, 2^399141993 is an apocalyptic number.

It is an amenable number.

399141993 is a deficient number, since it is larger than the sum of its proper divisors (167728407).

399141993 is a wasteful number, since it uses less digits than its factorization.

399141993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001.

The product of its digits is 236196, while the sum is 48.

The square root of 399141993 is about 19978.5383098964. The cubic root of 399141993 is about 736.2791017963.

The spelling of 399141993 in words is "three hundred ninety-nine million, one hundred forty-one thousand, nine hundred ninety-three".