396749 has 4 divisors (see below), whose sum is σ = 410460. Its totient is φ = 383040.

The previous prime is 396733. The next prime is 396833. The reversal of 396749 is 947693.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 947693 = 53 ⋅17881.

It can be written as a sum of positive squares in 2 ways, for example, as 302500 + 94249 = 550^2 + 307^2 .

It is a cyclic number.

It is not a de Polignac number, because 396749 - 2⁴ = 396733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (396709) 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, 6812 + ... + 6869.

It is an arithmetic number, because the mean of its divisors is an integer number (102615).

2³⁹⁶⁷⁴⁹ is an apocalyptic number.

It is an amenable number.

396749 is a deficient number, since it is larger than the sum of its proper divisors (13711).

396749 is a wasteful number, since it uses less digits than its factorization.

396749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13710.

The product of its digits is 40824, while the sum is 38.

The square root of 396749 is about 629.8801473296. The cubic root of 396749 is about 73.4804736258.

The spelling of 396749 in words is "three hundred ninety-six thousand, seven hundred forty-nine".