73663951 has 2 divisors, whose sum is σ = 73663952. Its totient is φ = 73663950.

The previous prime is 73663949. The next prime is 73663979. The reversal of 73663951 is 15936637.

It is a weak prime.

It is an emirp because it is prime and its reverse (15936637) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73663951 - 2¹ = 73663949 is a prime.

Together with 73663949, 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 (73663981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36831975 + 36831976.

It is an arithmetic number, because the mean of its divisors is an integer number (36831976).

Almost surely, 2^73663951 is an apocalyptic number.

73663951 is a deficient number, since it is larger than the sum of its proper divisors (1).

73663951 is an equidigital number, since it uses as much as digits as its factorization.

73663951 is an evil number, because the sum of its binary digits is even.

The product of its digits is 102060, while the sum is 40.

The square root of 73663951 is about 8582.7705899669. The cubic root of 73663951 is about 419.1971643816.

The spelling of 73663951 in words is "seventy-three million, six hundred sixty-three thousand, nine hundred fifty-one".