947817263 has 2 divisors, whose sum is σ = 947817264. Its totient is φ = 947817262.

The previous prime is 947817251. The next prime is 947817289. The reversal of 947817263 is 362718749.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 947817263 - 2¹⁰ = 947816239 is a prime.

It is a super-2 number, since 2×947817263² = 1796715128081622338, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (947817293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 473908631 + 473908632.

It is an arithmetic number, because the mean of its divisors is an integer number (473908632).

Almost surely, 2^947817263 is an apocalyptic number.

947817263 is a deficient number, since it is larger than the sum of its proper divisors (1).

947817263 is an equidigital number, since it uses as much as digits as its factorization.

947817263 is an evil number, because the sum of its binary digits is even.

The product of its digits is 508032, while the sum is 47.

The square root of 947817263 is about 30786.6409827380. The cubic root of 947817263 is about 982.2941059058.

The spelling of 947817263 in words is "nine hundred forty-seven million, eight hundred seventeen thousand, two hundred sixty-three".