73220429 has 2 divisors, whose sum is σ = 73220430. Its totient is φ = 73220428.

The previous prime is 73220417. The next prime is 73220491. The reversal of 73220429 is 92402237.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69973225 + 3247204 = 8365^2 + 1802^2 .

It is an emirp because it is prime and its reverse (92402237) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73220429 - 2¹² = 73216333 is a prime.

It is a super-2 number, since 2×73220429² = 10722462445888082, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73220029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36610214 + 36610215.

It is an arithmetic number, because the mean of its divisors is an integer number (36610215).

Almost surely, 2^73220429 is an apocalyptic number.

It is an amenable number.

73220429 is a deficient number, since it is larger than the sum of its proper divisors (1).

73220429 is an equidigital number, since it uses as much as digits as its factorization.

73220429 is an evil number, because the sum of its binary digits is even.

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

The square root of 73220429 is about 8556.8936536573. The cubic root of 73220429 is about 418.3541579273.

The spelling of 73220429 in words is "seventy-three million, two hundred twenty thousand, four hundred twenty-nine".