74891263 has 2 divisors, whose sum is σ = 74891264. Its totient is φ = 74891262.

The previous prime is 74891261. The next prime is 74891281. The reversal of 74891263 is 36219847.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 74891263 - 2¹ = 74891261 is a prime.

Together with 74891261, 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 (74891261) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37445631 + 37445632.

It is an arithmetic number, because the mean of its divisors is an integer number (37445632).

Almost surely, 2^74891263 is an apocalyptic number.

74891263 is a deficient number, since it is larger than the sum of its proper divisors (1).

74891263 is an equidigital number, since it uses as much as digits as its factorization.

74891263 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 40.

The square root of 74891263 is about 8653.9738270924. The cubic root of 74891263 is about 421.5124288824.

The spelling of 74891263 in words is "seventy-four million, eight hundred ninety-one thousand, two hundred sixty-three".