250868945 has 4 divisors (see below), whose sum is σ = 301042740. Its totient is φ = 200695152.

The previous prime is 250868941. The next prime is 250868993. The reversal of 250868945 is 549868052.

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 198697216 + 52171729 = 14096^2 + 7223^2 .

It is a cyclic number.

It is not a de Polignac number, because 250868945 - 2² = 250868941 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 250868945.

It is not an unprimeable number, because it can be changed into a prime (250868941) 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, 25086890 + ... + 25086899.

It is an arithmetic number, because the mean of its divisors is an integer number (75260685).

Almost surely, 2^250868945 is an apocalyptic number.

It is an amenable number.

250868945 is a deficient number, since it is larger than the sum of its proper divisors (50173795).

250868945 is an equidigital number, since it uses as much as digits as its factorization.

250868945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50173794.

The product of its (nonzero) digits is 691200, while the sum is 47.

The square root of 250868945 is about 15838.8429185973. The cubic root of 250868945 is about 630.6895490207.

The spelling of 250868945 in words is "two hundred fifty million, eight hundred sixty-eight thousand, nine hundred forty-five".