73624021 has 2 divisors, whose sum is σ = 73624022. Its totient is φ = 73624020.

The previous prime is 73624009. The next prime is 73624027. The reversal of 73624021 is 12042637.

73624021 is nontrivially palindromic in base 14.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59830225 + 13793796 = 7735^2 + 3714^2 .

It is a cyclic number.

It is not a de Polignac number, because 73624021 - 2¹⁵ = 73591253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73624027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36812010 + 36812011.

It is an arithmetic number, because the mean of its divisors is an integer number (36812011).

Almost surely, 2^73624021 is an apocalyptic number.

It is an amenable number.

73624021 is a deficient number, since it is larger than the sum of its proper divisors (1).

73624021 is an equidigital number, since it uses as much as digits as its factorization.

73624021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 73624021 is about 8580.4441027257. Note that the first 3 decimals coincide. The cubic root of 73624021 is about 419.1214078871.

Adding to 73624021 its reverse (12042637), we get a palindrome (85666658).

The spelling of 73624021 in words is "seventy-three million, six hundred twenty-four thousand, twenty-one".