73045409 has 2 divisors, whose sum is σ = 73045410. Its totient is φ = 73045408.

The previous prime is 73045391. The next prime is 73045429. The reversal of 73045409 is 90454037.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72199009 + 846400 = 8497^2 + 920^2 .

It is a cyclic number.

It is not a de Polignac number, because 73045409 - 2⁸ = 73045153 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (73045429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36522704 + 36522705.

It is an arithmetic number, because the mean of its divisors is an integer number (36522705).

Almost surely, 2^73045409 is an apocalyptic number.

It is an amenable number.

73045409 is a deficient number, since it is larger than the sum of its proper divisors (1).

73045409 is an equidigital number, since it uses as much as digits as its factorization.

73045409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 73045409 is about 8546.6606929256. The cubic root of 73045409 is about 418.0205590340.

The spelling of 73045409 in words is "seventy-three million, forty-five thousand, four hundred nine".