249706433 has 4 divisors (see below), whose sum is σ = 250387200. Its totient is φ = 249025668.

The previous prime is 249706427. The next prime is 249706453. The reversal of 249706433 is 334607942.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 249706433 - 2¹⁸ = 249444289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (249706403) 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, 339833 + ... + 340566.

It is an arithmetic number, because the mean of its divisors is an integer number (62596800).

Almost surely, 2^249706433 is an apocalyptic number.

It is an amenable number.

249706433 is a deficient number, since it is larger than the sum of its proper divisors (680767).

249706433 is an equidigital number, since it uses as much as digits as its factorization.

249706433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680766.

The product of its (nonzero) digits is 108864, while the sum is 38.

The square root of 249706433 is about 15802.1021702810. The cubic root of 249706433 is about 629.7138475385.

The spelling of 249706433 in words is "two hundred forty-nine million, seven hundred six thousand, four hundred thirty-three".