248479987 has 8 divisors (see below), whose sum is σ = 284402016. Its totient is φ = 212664192.

The previous prime is 248479969. The next prime is 248479993. The reversal of 248479987 is 789974842.

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 248479987 - 2¹⁹ = 247955699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (248479927) 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, 21478 + ... + 30955.

It is an arithmetic number, because the mean of its divisors is an integer number (35550252).

Almost surely, 2^248479987 is an apocalyptic number.

248479987 is a deficient number, since it is larger than the sum of its proper divisors (35922029).

248479987 is an equidigital number, since it uses as much as digits as its factorization.

248479987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53117.

The product of its digits is 8128512, while the sum is 58.

The square root of 248479987 is about 15763.2479838389. The cubic root of 248479987 is about 628.6811977250.

The spelling of 248479987 in words is "two hundred forty-eight million, four hundred seventy-nine thousand, nine hundred eighty-seven".