73407149 has 18 divisors (see below), whose sum is σ = 79903530. Its totient is φ = 67356576.

The previous prime is 73407137. The next prime is 73407157. The reversal of 73407149 is 94170437.

It can be written as a sum of positive squares in 3 ways, for example, as 42159049 + 31248100 = 6493^2 + 5590^2 .

It is not a de Polignac number, because 73407149 - 2⁴ = 73407133 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 (73407199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1707122 + ... + 1707164.

It is an arithmetic number, because the mean of its divisors is an integer number (4439085).

Almost surely, 2^73407149 is an apocalyptic number.

It is an amenable number.

73407149 is a deficient number, since it is larger than the sum of its proper divisors (6496381).

73407149 is an equidigital number, since it uses as much as digits as its factorization.

73407149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189 (or 109 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 73407149 is about 8567.7972081510. The cubic root of 73407149 is about 418.7094721600.

The spelling of 73407149 in words is "seventy-three million, four hundred seven thousand, one hundred forty-nine".