73645973 has 8 divisors (see below), whose sum is σ = 74570496. Its totient is φ = 72727200.

The previous prime is 73645969. The next prime is 73645981. The reversal of 73645973 is 37954637.

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 73645973 - 2² = 73645969 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 (73645573) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27953 + ... + 30473.

It is an arithmetic number, because the mean of its divisors is an integer number (9321312).

Almost surely, 2^73645973 is an apocalyptic number.

It is an amenable number.

73645973 is a deficient number, since it is larger than the sum of its proper divisors (924523).

73645973 is a wasteful number, since it uses less digits than its factorization.

73645973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2875.

The product of its digits is 476280, while the sum is 44.

The square root of 73645973 is about 8581.7231952563. The cubic root of 73645973 is about 419.1630593243.

The spelling of 73645973 in words is "seventy-three million, six hundred forty-five thousand, nine hundred seventy-three".