249749629 has 4 divisors (see below), whose sum is σ = 252041020. Its totient is φ = 247458240.

The previous prime is 249749603. The next prime is 249749639. The reversal of 249749629 is 926947942.

It is a happy number.

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 157628025 + 92121604 = 12555^2 + 9598^2 .

It is a cyclic number.

It is not a de Polignac number, because 249749629 - 2⁵ = 249749597 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 (249749639) 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, 1145532 + ... + 1145749.

It is an arithmetic number, because the mean of its divisors is an integer number (63010255).

Almost surely, 2^249749629 is an apocalyptic number.

It is an amenable number.

249749629 is a deficient number, since it is larger than the sum of its proper divisors (2291391).

249749629 is a wasteful number, since it uses less digits than its factorization.

249749629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2291390.

The product of its digits is 1959552, while the sum is 52.

The square root of 249749629 is about 15803.4688913542. The cubic root of 249749629 is about 629.7501562427.

The spelling of 249749629 in words is "two hundred forty-nine million, seven hundred forty-nine thousand, six hundred twenty-nine".