247324471649 has 2 divisors, whose sum is σ = 247324471650. Its totient is φ = 247324471648.

The previous prime is 247324471633. The next prime is 247324471781. The reversal of 247324471649 is 946174423742.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 220961104225 + 26363367424 = 470065^2 + 162368^2 .

It is a cyclic number.

It is not a de Polignac number, because 247324471649 - 2⁴ = 247324471633 is a prime.

It is a super-2 number, since 2×247324471649² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 247324471649.

It is not a weakly prime, because it can be changed into another prime (247324471349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123662235824 + 123662235825.

It is an arithmetic number, because the mean of its divisors is an integer number (123662235825).

Almost surely, 2^247324471649 is an apocalyptic number.

It is an amenable number.

247324471649 is a deficient number, since it is larger than the sum of its proper divisors (1).

247324471649 is an equidigital number, since it uses as much as digits as its factorization.

247324471649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8128512, while the sum is 53.

The spelling of 247324471649 in words is "two hundred forty-seven billion, three hundred twenty-four million, four hundred seventy-one thousand, six hundred forty-nine".