249734381 has 8 divisors (see below), whose sum is σ = 269215800. Its totient is φ = 230291712.

The previous prime is 249734351. The next prime is 249734383. The reversal of 249734381 is 183437942.

It can be written as a sum of positive squares in 4 ways, for example, as 21996100 + 227738281 = 4690^2 + 15091^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-249734381 is a prime.

It is a super-2 number, since 2×249734381² = 124734522106906322, 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 (249734383) 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, 4481 + ... + 22793.

It is an arithmetic number, because the mean of its divisors is an integer number (33651975).

Almost surely, 2^249734381 is an apocalyptic number.

It is an amenable number.

249734381 is a deficient number, since it is larger than the sum of its proper divisors (19481419).

249734381 is a wasteful number, since it uses less digits than its factorization.

249734381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19375.

The product of its digits is 145152, while the sum is 41.

The square root of 249734381 is about 15802.9864582616. The cubic root of 249734381 is about 629.7373399063.

The spelling of 249734381 in words is "two hundred forty-nine million, seven hundred thirty-four thousand, three hundred eighty-one".