249989942 has 4 divisors (see below), whose sum is σ = 374984916. Its totient is φ = 124994970.

The previous prime is 249989881. The next prime is 249989951.

249989942 is nontrivially palindromic in base 10.

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

It is a super-2 number, since 2×249989942² = 124989942202326728, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62497484 + ... + 62497487.

It is an arithmetic number, because the mean of its divisors is an integer number (93746229).

Almost surely, 2^249989942 is an apocalyptic number.

249989942 is a deficient number, since it is larger than the sum of its proper divisors (124994974).

249989942 is a wasteful number, since it uses less digits than its factorization.

249989942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124994973.

The product of its digits is 3359232, while the sum is 56.

The square root of 249989942 is about 15811.0702357557. The cubic root of 249989942 is about 629.9520766435.

The spelling of 249989942 in words is "two hundred forty-nine million, nine hundred eighty-nine thousand, nine hundred forty-two".