73499009 has 4 divisors (see below), whose sum is σ = 73569216. Its totient is φ = 73428804.

The previous prime is 73498981. The next prime is 73499017. The reversal of 73499009 is 90099437.

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: 90099437 = 4507 ⋅19991.

It is a cyclic number.

It is not a de Polignac number, because 73499009 - 2⁸ = 73498753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73499039) 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, 33509 + ... + 35634.

It is an arithmetic number, because the mean of its divisors is an integer number (18392304).

Almost surely, 2^73499009 is an apocalyptic number.

It is an amenable number.

73499009 is a deficient number, since it is larger than the sum of its proper divisors (70207).

73499009 is a wasteful number, since it uses less digits than its factorization.

73499009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70206.

The product of its (nonzero) digits is 61236, while the sum is 41.

The square root of 73499009 is about 8573.1563032526. The cubic root of 73499009 is about 418.8840537915.

The spelling of 73499009 in words is "seventy-three million, four hundred ninety-nine thousand, nine".