397699 has 4 divisors (see below), whose sum is σ = 410560. Its totient is φ = 384840.

The previous prime is 397697. The next prime is 397721. The reversal of 397699 is 996793.

397699 = T₄₂ + T₄₃ + ... + T₁₃₄.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 397699 - 2¹ = 397697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6384 + ... + 6445.

It is an arithmetic number, because the mean of its divisors is an integer number (102640).

2³⁹⁷⁶⁹⁹ is an apocalyptic number.

397699 is a deficient number, since it is larger than the sum of its proper divisors (12861).

397699 is a wasteful number, since it uses less digits than its factorization.

397699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12860.

The product of its digits is 91854, while the sum is 43.

The square root of 397699 is about 630.6338081645. The cubic root of 397699 is about 73.5390755863.

The spelling of 397699 in words is "three hundred ninety-seven thousand, six hundred ninety-nine".