73220393 has 2 divisors, whose sum is σ = 73220394. Its totient is φ = 73220392.

The previous prime is 73220351. The next prime is 73220417. The reversal of 73220393 is 39302237.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59105344 + 14115049 = 7688^2 + 3757^2 .

It is a cyclic number.

It is not a de Polignac number, because 73220393 - 2¹⁶ = 73154857 is a prime.

It is a super-2 number, since 2×73220393² = 10722451902148898, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (73220093) 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, 36610196 + 36610197.

It is an arithmetic number, because the mean of its divisors is an integer number (36610197).

Almost surely, 2^73220393 is an apocalyptic number.

It is an amenable number.

73220393 is a deficient number, since it is larger than the sum of its proper divisors (1).

73220393 is an equidigital number, since it uses as much as digits as its factorization.

73220393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804, while the sum is 29.

The square root of 73220393 is about 8556.8915500899. The cubic root of 73220393 is about 418.3540893638.

The spelling of 73220393 in words is "seventy-three million, two hundred twenty thousand, three hundred ninety-three".