73012609 has 2 divisors, whose sum is σ = 73012610. Its totient is φ = 73012608.

The previous prime is 73012601. The next prime is 73012619. The reversal of 73012609 is 90621037.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69772609 + 3240000 = 8353^2 + 1800^2 .

It is a cyclic number.

It is not a de Polignac number, because 73012609 - 2³ = 73012601 is a prime.

It is not a weakly prime, because it can be changed into another prime (73012601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36506304 + 36506305.

It is an arithmetic number, because the mean of its divisors is an integer number (36506305).

Almost surely, 2^73012609 is an apocalyptic number.

It is an amenable number.

73012609 is a deficient number, since it is larger than the sum of its proper divisors (1).

73012609 is an equidigital number, since it uses as much as digits as its factorization.

73012609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 73012609 is about 8544.7415993698. The cubic root of 73012609 is about 417.9579809414.

The spelling of 73012609 in words is "seventy-three million, twelve thousand, six hundred nine".