393700249 has 4 divisors (see below), whose sum is σ = 397184436. Its totient is φ = 390216064.

The previous prime is 393700231. The next prime is 393700319. The reversal of 393700249 is 942007393.

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

It can be written as a sum of positive squares in 2 ways, for example, as 26594649 + 367105600 = 5157^2 + 19160^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-393700249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (393700049) 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, 1741924 + ... + 1742149.

It is an arithmetic number, because the mean of its divisors is an integer number (99296109).

Almost surely, 2^393700249 is an apocalyptic number.

It is an amenable number.

393700249 is a deficient number, since it is larger than the sum of its proper divisors (3484187).

393700249 is a wasteful number, since it uses less digits than its factorization.

393700249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3484186.

The product of its (nonzero) digits is 40824, while the sum is 37.

The square root of 393700249 is about 19841.8811860166. The cubic root of 393700249 is about 732.9177333602.

The spelling of 393700249 in words is "three hundred ninety-three million, seven hundred thousand, two hundred forty-nine".