248931987 has 8 divisors (see below), whose sum is σ = 332315904. Its totient is φ = 165751368.

The previous prime is 248931983. The next prime is 248932051. The reversal of 248931987 is 789139842.

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

It is not a de Polignac number, because 248931987 - 2² = 248931983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (248931983) 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, 47943 + ... + 52880.

It is an arithmetic number, because the mean of its divisors is an integer number (41539488).

Almost surely, 2^248931987 is an apocalyptic number.

248931987 is a deficient number, since it is larger than the sum of its proper divisors (83383917).

248931987 is a wasteful number, since it uses less digits than its factorization.

248931987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101649.

The product of its digits is 870912, while the sum is 51.

The square root of 248931987 is about 15777.5786165051. The cubic root of 248931987 is about 629.0621697502.

The spelling of 248931987 in words is "two hundred forty-eight million, nine hundred thirty-one thousand, nine hundred eighty-seven".