73121263 has 2 divisors, whose sum is σ = 73121264. Its totient is φ = 73121262.

The previous prime is 73121261. The next prime is 73121309. The reversal of 73121263 is 36212137.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 73121263 - 2¹ = 73121261 is a prime.

Together with 73121261, it forms a pair of twin primes.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73121261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36560631 + 36560632.

It is an arithmetic number, because the mean of its divisors is an integer number (36560632).

Almost surely, 2^73121263 is an apocalyptic number.

73121263 is a deficient number, since it is larger than the sum of its proper divisors (1).

73121263 is an equidigital number, since it uses as much as digits as its factorization.

73121263 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512, while the sum is 25.

The square root of 73121263 is about 8551.0971810640. The cubic root of 73121263 is about 418.1652067827.

The spelling of 73121263 in words is "seventy-three million, one hundred twenty-one thousand, two hundred sixty-three".