73626221 has 2 divisors, whose sum is σ = 73626222. Its totient is φ = 73626220.

The previous prime is 73626199. The next prime is 73626227. The reversal of 73626221 is 12262637.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43705321 + 29920900 = 6611^2 + 5470^2 .

It is a cyclic number.

It is not a de Polignac number, because 73626221 - 2¹⁰ = 73625197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73626227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36813110 + 36813111.

It is an arithmetic number, because the mean of its divisors is an integer number (36813111).

Almost surely, 2^73626221 is an apocalyptic number.

It is an amenable number.

73626221 is a deficient number, since it is larger than the sum of its proper divisors (1).

73626221 is an equidigital number, since it uses as much as digits as its factorization.

73626221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 29.

The square root of 73626221 is about 8580.5723002606. The cubic root of 73626221 is about 419.1255825115.

Adding to 73626221 its reverse (12262637), we get a palindrome (85888858).

The spelling of 73626221 in words is "seventy-three million, six hundred twenty-six thousand, two hundred twenty-one".