247887329 has 2 divisors, whose sum is σ = 247887330. Its totient is φ = 247887328.

The previous prime is 247887323. The next prime is 247887359. The reversal of 247887329 is 923788742.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 245862400 + 2024929 = 15680^2 + 1423^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-247887329 is a prime.

It is a super-2 number, since 2×247887329² = 122896255757508482, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (247887323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123943664 + 123943665.

It is an arithmetic number, because the mean of its divisors is an integer number (123943665).

Almost surely, 2^247887329 is an apocalyptic number.

It is an amenable number.

247887329 is a deficient number, since it is larger than the sum of its proper divisors (1).

247887329 is an equidigital number, since it uses as much as digits as its factorization.

247887329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1354752, while the sum is 50.

The square root of 247887329 is about 15744.4380337947. The cubic root of 247887329 is about 628.1809702326.

The spelling of 247887329 in words is "two hundred forty-seven million, eight hundred eighty-seven thousand, three hundred twenty-nine".