249276989 has 8 divisors (see below), whose sum is σ = 271111512. Its totient is φ = 227822400.

The previous prime is 249276961. The next prime is 249277003. The reversal of 249276989 is 989672942.

It can be written as a sum of positive squares in 4 ways, for example, as 78765625 + 170511364 = 8875^2 + 13058^2 .

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

It is not a de Polignac number, because 249276989 - 2²⁰ = 248228413 is a prime.

It is a super-2 number, since 2×249276989² = 124278034489812242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249276959) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93614 + ... + 96239.

It is an arithmetic number, because the mean of its divisors is an integer number (33888939).

Almost surely, 2^249276989 is an apocalyptic number.

It is an amenable number.

249276989 is a deficient number, since it is larger than the sum of its proper divisors (21834523).

249276989 is a wasteful number, since it uses less digits than its factorization.

249276989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189967.

The product of its digits is 3919104, while the sum is 56.

The square root of 249276989 is about 15788.5081309160. The cubic root of 249276989 is about 629.3526473819.

The spelling of 249276989 in words is "two hundred forty-nine million, two hundred seventy-six thousand, nine hundred eighty-nine".