249971087 has 8 divisors (see below), whose sum is σ = 263339760. Its totient is φ = 236623680.

The previous prime is 249971041. The next prime is 249971093. The reversal of 249971087 is 780179942.

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

It is a cyclic number.

It is not a de Polignac number, because 249971087 - 2¹² = 249966991 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 (249979087) 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, 22637 + ... + 31817.

It is an arithmetic number, because the mean of its divisors is an integer number (32917470).

Almost surely, 2^249971087 is an apocalyptic number.

249971087 is a deficient number, since it is larger than the sum of its proper divisors (13368673).

249971087 is a wasteful number, since it uses less digits than its factorization.

249971087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10633.

The product of its (nonzero) digits is 254016, while the sum is 47.

The square root of 249971087 is about 15810.4739650651. The cubic root of 249971087 is about 629.9362386129.

The spelling of 249971087 in words is "two hundred forty-nine million, nine hundred seventy-one thousand, eighty-seven".