249948487 has 4 divisors (see below), whose sum is σ = 250145496. Its totient is φ = 249751480.

The previous prime is 249948473. The next prime is 249948529. The reversal of 249948487 is 784849942.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-249948487 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 (249948407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96589 + ... + 99142.

It is an arithmetic number, because the mean of its divisors is an integer number (62536374).

Almost surely, 2^249948487 is an apocalyptic number.

249948487 is a deficient number, since it is larger than the sum of its proper divisors (197009).

249948487 is a wasteful number, since it uses less digits than its factorization.

249948487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197008.

The product of its digits is 4644864, while the sum is 55.

The square root of 249948487 is about 15809.7592328283. The cubic root of 249948487 is about 629.9172537666.

The spelling of 249948487 in words is "two hundred forty-nine million, nine hundred forty-eight thousand, four hundred eighty-seven".