250001389 has 4 divisors (see below), whose sum is σ = 272728800. Its totient is φ = 227273980.

The previous prime is 250001387. The next prime is 250001399. The reversal of 250001389 is 983100052.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 250001389 - 2¹ = 250001387 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 (250001387) 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, 11363689 + ... + 11363710.

It is an arithmetic number, because the mean of its divisors is an integer number (68182200).

Almost surely, 2^250001389 is an apocalyptic number.

It is an amenable number.

250001389 is a deficient number, since it is larger than the sum of its proper divisors (22727411).

250001389 is a wasteful number, since it uses less digits than its factorization.

250001389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22727410.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 250001389 is about 15811.4322248176. The cubic root of 250001389 is about 629.9616916322.

The spelling of 250001389 in words is "two hundred fifty million, one thousand, three hundred eighty-nine".