73212906 has 32 divisors (see below), whose sum is σ = 158195520. Its totient is φ = 22454784.

The previous prime is 73212901. The next prime is 73212911. The reversal of 73212906 is 60921237.

It is an interprime number because it is at equal distance from previous prime (73212901) and next prime (73212911).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (73212901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26205 + ... + 28863.

It is an arithmetic number, because the mean of its divisors is an integer number (4943610).

Almost surely, 2^73212906 is an apocalyptic number.

73212906 is an abundant number, since it is smaller than the sum of its proper divisors (84982614).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

73212906 is a wasteful number, since it uses less digits than its factorization.

73212906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3030.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 73212906 is about 8556.4540552731. The cubic root of 73212906 is about 418.3398295667.

The spelling of 73212906 in words is "seventy-three million, two hundred twelve thousand, nine hundred six".