247646233 has 2 divisors, whose sum is σ = 247646234. Its totient is φ = 247646232.

The previous prime is 247646177. The next prime is 247646239. The reversal of 247646233 is 332646742.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 193432464 + 54213769 = 13908^2 + 7363^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-247646233 is a prime.

It is a super-2 number, since 2×247646233² = 122657313438180578, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 247646192 and 247646201.

It is not a weakly prime, because it can be changed into another prime (247646239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123823116 + 123823117.

It is an arithmetic number, because the mean of its divisors is an integer number (123823117).

Almost surely, 2^247646233 is an apocalyptic number.

It is an amenable number.

247646233 is a deficient number, since it is larger than the sum of its proper divisors (1).

247646233 is an equidigital number, since it uses as much as digits as its factorization.

247646233 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 37.

The square root of 247646233 is about 15736.7796260861. The cubic root of 247646233 is about 627.9772472385.

The spelling of 247646233 in words is "two hundred forty-seven million, six hundred forty-six thousand, two hundred thirty-three".