248219987 has 2 divisors, whose sum is σ = 248219988. Its totient is φ = 248219986.

The previous prime is 248219963. The next prime is 248220029. The reversal of 248219987 is 789912842.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 248219987 - 2¹⁶ = 248154451 is a prime.

It is a super-2 number, since 2×248219987² = 123226323892560338, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (248219927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124109993 + 124109994.

It is an arithmetic number, because the mean of its divisors is an integer number (124109994).

Almost surely, 2^248219987 is an apocalyptic number.

248219987 is a deficient number, since it is larger than the sum of its proper divisors (1).

248219987 is an equidigital number, since it uses as much as digits as its factorization.

248219987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608, while the sum is 50.

The square root of 248219987 is about 15754.9987940336. The cubic root of 248219987 is about 628.4618451750.

The spelling of 248219987 in words is "two hundred forty-eight million, two hundred nineteen thousand, nine hundred eighty-seven".