249712733 has 4 divisors (see below), whose sum is σ = 254424348. Its totient is φ = 245001120.

The previous prime is 249712699. The next prime is 249712769. The reversal of 249712733 is 337217942.

249712733 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 220314649 + 29398084 = 14843^2 + 5422^2 .

It is a cyclic number.

It is not a de Polignac number, because 249712733 - 2¹² = 249708637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249712933) 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, 2355728 + ... + 2355833.

It is an arithmetic number, because the mean of its divisors is an integer number (63606087).

Almost surely, 2^249712733 is an apocalyptic number.

It is an amenable number.

249712733 is a deficient number, since it is larger than the sum of its proper divisors (4711615).

249712733 is an equidigital number, since it uses as much as digits as its factorization.

249712733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4711614.

The product of its digits is 63504, while the sum is 38.

The square root of 249712733 is about 15802.3015095903. The cubic root of 249712733 is about 629.7191433090.

The spelling of 249712733 in words is "two hundred forty-nine million, seven hundred twelve thousand, seven hundred thirty-three".