73854509 has 2 divisors, whose sum is σ = 73854510. Its totient is φ = 73854508.

The previous prime is 73854481. The next prime is 73854523. The reversal of 73854509 is 90545837.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64722025 + 9132484 = 8045^2 + 3022^2 .

It is an emirp because it is prime and its reverse (90545837) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73854509 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73854559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36927254 + 36927255.

It is an arithmetic number, because the mean of its divisors is an integer number (36927255).

Almost surely, 2^73854509 is an apocalyptic number.

It is an amenable number.

73854509 is a deficient number, since it is larger than the sum of its proper divisors (1).

73854509 is an equidigital number, since it uses as much as digits as its factorization.

73854509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 151200, while the sum is 41.

The square root of 73854509 is about 8593.8646137812. The cubic root of 73854509 is about 419.5583206435.

The spelling of 73854509 in words is "seventy-three million, eight hundred fifty-four thousand, five hundred nine".