249920834 has 8 divisors (see below), whose sum is σ = 375097548. Its totient is φ = 124888320.

The previous prime is 249920833. The next prime is 249920861. The reversal of 249920834 is 438029942.

It can be written as a sum of positive squares in 2 ways, for example, as 227859025 + 22061809 = 15095^2 + 4697^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 249920791 and 249920800.

It is not an unprimeable number, because it can be changed into a prime (249920831) 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, 31607 + ... + 38714.

Almost surely, 2^249920834 is an apocalyptic number.

249920834 is a deficient number, since it is larger than the sum of its proper divisors (125176714).

249920834 is a wasteful number, since it uses less digits than its factorization.

249920834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72100.

The product of its (nonzero) digits is 124416, while the sum is 41.

The square root of 249920834 is about 15808.8846538900. The cubic root of 249920834 is about 629.8940226541.

The spelling of 249920834 in words is "two hundred forty-nine million, nine hundred twenty thousand, eight hundred thirty-four".