73212749 has 8 divisors (see below), whose sum is σ = 77649792. Its totient is φ = 68880240.

The previous prime is 73212743. The next prime is 73212817. The reversal of 73212749 is 94721237.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 73212749 - 2⁸ = 73212493 is a prime.

It is a super-2 number, since 2×73212749² = 10720213232274002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73212743) 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 7 ways as a sum of consecutive naturals, for example, 24689 + ... + 27494.

It is an arithmetic number, because the mean of its divisors is an integer number (9706224).

Almost surely, 2^73212749 is an apocalyptic number.

It is an amenable number.

73212749 is a deficient number, since it is larger than the sum of its proper divisors (4437043).

73212749 is a wasteful number, since it uses less digits than its factorization.

73212749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52267.

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

The square root of 73212749 is about 8556.4448809070. Note that the first 3 decimals coincide. The cubic root of 73212749 is about 418.3395305329.

The spelling of 73212749 in words is "seventy-three million, two hundred twelve thousand, seven hundred forty-nine".