73730551 has 2 divisors, whose sum is σ = 73730552. Its totient is φ = 73730550.

The previous prime is 73730549. The next prime is 73730563. The reversal of 73730551 is 15503737.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (15503737) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73730551 - 2¹ = 73730549 is a prime.

Together with 73730549, 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 (73730651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36865275 + 36865276.

It is an arithmetic number, because the mean of its divisors is an integer number (36865276).

Almost surely, 2^73730551 is an apocalyptic number.

73730551 is a deficient number, since it is larger than the sum of its proper divisors (1).

73730551 is an equidigital number, since it uses as much as digits as its factorization.

73730551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11025, while the sum is 31.

The square root of 73730551 is about 8586.6495794343. The cubic root of 73730551 is about 419.3234591803.

The spelling of 73730551 in words is "seventy-three million, seven hundred thirty thousand, five hundred fifty-one".