247118387 has 2 divisors, whose sum is σ = 247118388. Its totient is φ = 247118386.

The previous prime is 247118353. The next prime is 247118413. The reversal of 247118387 is 783811742.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 247118387 - 2⁶ = 247118323 is a prime.

It is a super-2 number, since 2×247118387² = 122134994386963538, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (247118327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123559193 + 123559194.

It is an arithmetic number, because the mean of its divisors is an integer number (123559194).

Almost surely, 2^247118387 is an apocalyptic number.

247118387 is a deficient number, since it is larger than the sum of its proper divisors (1).

247118387 is an equidigital number, since it uses as much as digits as its factorization.

247118387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75264, while the sum is 41.

The square root of 247118387 is about 15719.9995865140. Note that the first 3 decimals coincide. The cubic root of 247118387 is about 627.5307621306.

The spelling of 247118387 in words is "two hundred forty-seven million, one hundred eighteen thousand, three hundred eighty-seven".