249263549 has 4 divisors (see below), whose sum is σ = 249374364. Its totient is φ = 249152736.

The previous prime is 249263533. The next prime is 249263569. The reversal of 249263549 is 945362942.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 945362942 = 2 ⋅472681471.

It can be written as a sum of positive squares in 2 ways, for example, as 161747524 + 87516025 = 12718^2 + 9355^2 .

It is a cyclic number.

It is not a de Polignac number, because 249263549 - 2⁴ = 249263533 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 (249263569) 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, 51962 + ... + 56555.

It is an arithmetic number, because the mean of its divisors is an integer number (62343591).

Almost surely, 2^249263549 is an apocalyptic number.

It is an amenable number.

249263549 is a deficient number, since it is larger than the sum of its proper divisors (110815).

249263549 is a wasteful number, since it uses less digits than its factorization.

249263549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110814.

The product of its digits is 466560, while the sum is 44.

The square root of 249263549 is about 15788.0824991511. The cubic root of 249263549 is about 629.3413364681.

The spelling of 249263549 in words is "two hundred forty-nine million, two hundred sixty-three thousand, five hundred forty-nine".