73064021 has 8 divisors (see below), whose sum is σ = 76621080. Its totient is φ = 69576192.

The previous prime is 73063979. The next prime is 73064029. The reversal of 73064021 is 12046037.

It can be written as a sum of positive squares in 4 ways, for example, as 27352900 + 45711121 = 5230^2 + 6761^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 73064021 - 2⁶ = 73063957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73064029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15140 + ... + 19373.

It is an arithmetic number, because the mean of its divisors is an integer number (9577635).

Almost surely, 2^73064021 is an apocalyptic number.

It is an amenable number.

73064021 is a deficient number, since it is larger than the sum of its proper divisors (3557059).

73064021 is a wasteful number, since it uses less digits than its factorization.

73064021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34615.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 73064021 is about 8547.7494698897. The cubic root of 73064021 is about 418.0560599552.

The spelling of 73064021 in words is "seventy-three million, sixty-four thousand, twenty-one".