73198909 has 4 divisors (see below), whose sum is σ = 83655904. Its totient is φ = 62741916.

The previous prime is 73198891. The next prime is 73198921. The reversal of 73198909 is 90989137.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90989137 = 5839 ⋅15583.

It is a cyclic number.

It is not a de Polignac number, because 73198909 - 2⁵ = 73198877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73198969) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5228487 + ... + 5228500.

It is an arithmetic number, because the mean of its divisors is an integer number (20913976).

Almost surely, 2^73198909 is an apocalyptic number.

It is an amenable number.

73198909 is a deficient number, since it is larger than the sum of its proper divisors (10456995).

73198909 is a wasteful number, since it uses less digits than its factorization.

73198909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10456994.

The product of its (nonzero) digits is 122472, while the sum is 46.

The square root of 73198909 is about 8555.6360955805. The cubic root of 73198909 is about 418.3131681664.

The spelling of 73198909 in words is "seventy-three million, one hundred ninety-eight thousand, nine hundred nine".