248742919 has 2 divisors, whose sum is σ = 248742920. Its totient is φ = 248742918.

The previous prime is 248742913. The next prime is 248742943. The reversal of 248742919 is 919247842.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 248742919 - 2³ = 248742911 is a prime.

It is a super-2 number, since 2×248742919² = 123746079505281122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (248742911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124371459 + 124371460.

It is an arithmetic number, because the mean of its divisors is an integer number (124371460).

Almost surely, 2^248742919 is an apocalyptic number.

248742919 is a deficient number, since it is larger than the sum of its proper divisors (1).

248742919 is an equidigital number, since it uses as much as digits as its factorization.

248742919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 46.

The square root of 248742919 is about 15771.5858111986. The cubic root of 248742919 is about 628.9028683393.

The spelling of 248742919 in words is "two hundred forty-eight million, seven hundred forty-two thousand, nine hundred nineteen".