248430509 has 2 divisors, whose sum is σ = 248430510. Its totient is φ = 248430508.

The previous prime is 248430463. The next prime is 248430517. The reversal of 248430509 is 905034842.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 190716100 + 57714409 = 13810^2 + 7597^2 .

It is a cyclic number.

It is not a de Polignac number, because 248430509 - 2¹⁶ = 248364973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (248430569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124215254 + 124215255.

It is an arithmetic number, because the mean of its divisors is an integer number (124215255).

Almost surely, 2^248430509 is an apocalyptic number.

It is an amenable number.

248430509 is a deficient number, since it is larger than the sum of its proper divisors (1).

248430509 is an equidigital number, since it uses as much as digits as its factorization.

248430509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 248430509 is about 15761.6784956425. The cubic root of 248430509 is about 628.6394667275.

The spelling of 248430509 in words is "two hundred forty-eight million, four hundred thirty thousand, five hundred nine".