73406609 has 2 divisors, whose sum is σ = 73406610. Its totient is φ = 73406608.

The previous prime is 73406587. The next prime is 73406651. The reversal of 73406609 is 90660437.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62331025 + 11075584 = 7895^2 + 3328^2 .

It is a cyclic number.

It is not a de Polignac number, because 73406609 - 2²⁴ = 56629393 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (73406009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36703304 + 36703305.

It is an arithmetic number, because the mean of its divisors is an integer number (36703305).

Almost surely, 2^73406609 is an apocalyptic number.

It is an amenable number.

73406609 is a deficient number, since it is larger than the sum of its proper divisors (1).

73406609 is an equidigital number, since it uses as much as digits as its factorization.

73406609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 73406609 is about 8567.7656947421. The cubic root of 73406609 is about 418.7084454495.

The spelling of 73406609 in words is "seventy-three million, four hundred six thousand, six hundred nine".