248621183989 has 2 divisors, whose sum is σ = 248621183990. Its totient is φ = 248621183988.

The previous prime is 248621183977. The next prime is 248621184011. The reversal of 248621183989 is 989381126842.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 168054903025 + 80566280964 = 409945^2 + 283842^2 .

It is a cyclic number.

It is not a de Polignac number, because 248621183989 - 2⁷ = 248621183861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (248621180989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124310591994 + 124310591995.

It is an arithmetic number, because the mean of its divisors is an integer number (124310591995).

Almost surely, 2^248621183989 is an apocalyptic number.

It is an amenable number.

248621183989 is a deficient number, since it is larger than the sum of its proper divisors (1).

248621183989 is an equidigital number, since it uses as much as digits as its factorization.

248621183989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11943936, while the sum is 61.

The spelling of 248621183989 in words is "two hundred forty-eight billion, six hundred twenty-one million, one hundred eighty-three thousand, nine hundred eighty-nine".