73479221 has 2 divisors, whose sum is σ = 73479222. Its totient is φ = 73479220.

The previous prime is 73479209. The next prime is 73479229. The reversal of 73479221 is 12297437.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72063121 + 1416100 = 8489^2 + 1190^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73479221 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73479229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36739610 + 36739611.

It is an arithmetic number, because the mean of its divisors is an integer number (36739611).

Almost surely, 2^73479221 is an apocalyptic number.

It is an amenable number.

73479221 is a deficient number, since it is larger than the sum of its proper divisors (1).

73479221 is an equidigital number, since it uses as much as digits as its factorization.

73479221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21168, while the sum is 35.

The square root of 73479221 is about 8572.0021581892. The cubic root of 73479221 is about 418.8464586286.

The spelling of 73479221 in words is "seventy-three million, four hundred seventy-nine thousand, two hundred twenty-one".