249953741 has 4 divisors (see below), whose sum is σ = 252762300. Its totient is φ = 247145184.

The previous prime is 249953707. The next prime is 249953747. The reversal of 249953741 is 147359942.

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 149352841 + 100600900 = 12221^2 + 10030^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-249953741 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 249953692 and 249953701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249953747) 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, 1404146 + ... + 1404323.

It is an arithmetic number, because the mean of its divisors is an integer number (63190575).

Almost surely, 2^249953741 is an apocalyptic number.

It is an amenable number.

249953741 is a deficient number, since it is larger than the sum of its proper divisors (2808559).

249953741 is an equidigital number, since it uses as much as digits as its factorization.

249953741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2808558.

The product of its digits is 272160, while the sum is 44.

The square root of 249953741 is about 15809.9253951434. The cubic root of 249953741 is about 629.9216674254.

The spelling of 249953741 in words is "two hundred forty-nine million, nine hundred fifty-three thousand, seven hundred forty-one".