399634073 has 8 divisors (see below), whose sum is σ = 404683776. Its totient is φ = 394606000.

The previous prime is 399634057. The next prime is 399634097. The reversal of 399634073 is 370436993.

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 399634073 - 2⁴ = 399634057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (399634013) 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, 33518 + ... + 43848.

It is an arithmetic number, because the mean of its divisors is an integer number (50585472).

Almost surely, 2^399634073 is an apocalyptic number.

It is an amenable number.

399634073 is a deficient number, since it is larger than the sum of its proper divisors (5049703).

399634073 is a wasteful number, since it uses less digits than its factorization.

399634073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10815.

The product of its (nonzero) digits is 367416, while the sum is 44.

The square root of 399634073 is about 19990.8497318148. The cubic root of 399634073 is about 736.5815500801.

The spelling of 399634073 in words is "three hundred ninety-nine million, six hundred thirty-four thousand, seventy-three".