74978263 has 2 divisors, whose sum is σ = 74978264. Its totient is φ = 74978262.

The previous prime is 74978261. The next prime is 74978287. The reversal of 74978263 is 36287947.

It is a weak prime.

It is an emirp because it is prime and its reverse (36287947) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74978263 - 2¹ = 74978261 is a prime.

Together with 74978261, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74978261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37489131 + 37489132.

It is an arithmetic number, because the mean of its divisors is an integer number (37489132).

Almost surely, 2^74978263 is an apocalyptic number.

74978263 is a deficient number, since it is larger than the sum of its proper divisors (1).

74978263 is an equidigital number, since it uses as much as digits as its factorization.

74978263 is an evil number, because the sum of its binary digits is even.

The product of its digits is 508032, while the sum is 46.

The square root of 74978263 is about 8658.9989606189. The cubic root of 74978263 is about 421.6755871679.

The spelling of 74978263 in words is "seventy-four million, nine hundred seventy-eight thousand, two hundred sixty-three".