399393701 has 4 divisors (see below), whose sum is σ = 456449952. Its totient is φ = 342337452.

The previous prime is 399393697. The next prime is 399393721. The reversal of 399393701 is 107393993.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 399393701 - 2² = 399393697 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399393721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28528115 + ... + 28528128.

It is an arithmetic number, because the mean of its divisors is an integer number (114112488).

Almost surely, 2^399393701 is an apocalyptic number.

It is an amenable number.

399393701 is a deficient number, since it is larger than the sum of its proper divisors (57056251).

399393701 is an equidigital number, since it uses as much as digits as its factorization.

399393701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57056250.

The product of its (nonzero) digits is 137781, while the sum is 44.

The square root of 399393701 is about 19984.8367769166. The cubic root of 399393701 is about 736.4338407111.

The spelling of 399393701 in words is "three hundred ninety-nine million, three hundred ninety-three thousand, seven hundred one".