399000743 has 8 divisors (see below), whose sum is σ = 401401728. Its totient is φ = 396605664.

The previous prime is 399000737. The next prime is 399000769. The reversal of 399000743 is 347000993.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-399000743 is a prime.

It is a house number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399000793) 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, 242921 + ... + 244557.

It is an arithmetic number, because the mean of its divisors is an integer number (50175216).

Almost surely, 2^399000743 is an apocalyptic number.

399000743 is a deficient number, since it is larger than the sum of its proper divisors (2400985).

399000743 is a wasteful number, since it uses less digits than its factorization.

399000743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2953.

The product of its (nonzero) digits is 20412, while the sum is 35.

The square root of 399000743 is about 19975.0029536919. The cubic root of 399000743 is about 736.1922390630.

The spelling of 399000743 in words is "three hundred ninety-nine million, seven hundred forty-three", and thus it is an aban number.