73212649 has 4 divisors (see below), whose sum is σ = 74215636. Its totient is φ = 72209664.

The previous prime is 73212619. The next prime is 73212673. The reversal of 73212649 is 94621237.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32661225 + 40551424 = 5715^2 + 6368^2 .

It is a cyclic number.

It is not a de Polignac number, because 73212649 - 2⁷ = 73212521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73212619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 501384 + ... + 501529.

It is an arithmetic number, because the mean of its divisors is an integer number (18553909).

Almost surely, 2^73212649 is an apocalyptic number.

It is an amenable number.

73212649 is a deficient number, since it is larger than the sum of its proper divisors (1002987).

73212649 is a wasteful number, since it uses less digits than its factorization.

73212649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1002986.

The product of its digits is 18144, while the sum is 34.

The square root of 73212649 is about 8556.4390373566. The cubic root of 73212649 is about 418.3393400653.

The spelling of 73212649 in words is "seventy-three million, two hundred twelve thousand, six hundred forty-nine".