73801809 has 12 divisors (see below), whose sum is σ = 107243136. Its totient is φ = 48905592.

The previous prime is 73801807. The next prime is 73801813. The reversal of 73801809 is 90810837.

It is not a de Polignac number, because 73801809 - 2¹ = 73801807 is a prime.

It is not an unprimeable number, because it can be changed into a prime (73801807) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23049 + ... + 26054.

It is an arithmetic number, because the mean of its divisors is an integer number (8936928).

Almost surely, 2^73801809 is an apocalyptic number.

It is an amenable number.

73801809 is a deficient number, since it is larger than the sum of its proper divisors (33441327).

73801809 is a wasteful number, since it uses less digits than its factorization.

73801809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49276 (or 49273 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 73801809 is about 8590.7979256877. The cubic root of 73801809 is about 419.4585028394.

Subtracting 73801809 from its reverse (90810837), we obtain a triangular number (17009028 = T₅₈₃₂).

The spelling of 73801809 in words is "seventy-three million, eight hundred one thousand, eight hundred nine".