249999938 has 4 divisors (see below), whose sum is σ = 374999910. Its totient is φ = 124999968.

The previous prime is 249999917. The next prime is 249999941. The reversal of 249999938 is 839999942.

249999938 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 126945289 + 123054649 = 11267^2 + 11093^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62499983 + ... + 62499986.

Almost surely, 2^249999938 is an apocalyptic number.

249999938 is a deficient number, since it is larger than the sum of its proper divisors (124999972).

249999938 is a wasteful number, since it uses less digits than its factorization.

249999938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124999971.

The product of its digits is 11337408, while the sum is 62.

The square root of 249999938 is about 15811.3863402296. The cubic root of 249999938 is about 629.9604728707.

The spelling of 249999938 in words is "two hundred forty-nine million, nine hundred ninety-nine thousand, nine hundred thirty-eight".