73906561 has 8 divisors (see below), whose sum is σ = 78958880. Its totient is φ = 68970528.

The previous prime is 73906549. The next prime is 73906571. The reversal of 73906561 is 16560937.

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 73906561 - 2¹³ = 73898369 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 73906561.

It is not an unprimeable number, because it can be changed into a prime (73906571) 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, 27756 + ... + 30301.

It is an arithmetic number, because the mean of its divisors is an integer number (9869860).

Almost surely, 2^73906561 is an apocalyptic number.

It is an amenable number.

73906561 is a deficient number, since it is larger than the sum of its proper divisors (5052319).

73906561 is a wasteful number, since it uses less digits than its factorization.

73906561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58143.

The product of its (nonzero) digits is 34020, while the sum is 37.

The square root of 73906561 is about 8596.8925199749. The cubic root of 73906561 is about 419.6568644851.

The spelling of 73906561 in words is "seventy-three million, nine hundred six thousand, five hundred sixty-one".