73643975 has 12 divisors (see below), whose sum is σ = 91797696. Its totient is φ = 58606080.

The previous prime is 73643959. The next prime is 73643987. The reversal of 73643975 is 57934637.

It is not a de Polignac number, because 73643975 - 2⁴ = 73643959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2807 + ... + 12456.

It is an arithmetic number, because the mean of its divisors is an integer number (7649808).

Almost surely, 2^73643975 is an apocalyptic number.

73643975 is a deficient number, since it is larger than the sum of its proper divisors (18153721).

73643975 is a wasteful number, since it uses less digits than its factorization.

73643975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15466 (or 15461 counting only the distinct ones).

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

The square root of 73643975 is about 8581.6067842800. The cubic root of 73643975 is about 419.1592686877.

The spelling of 73643975 in words is "seventy-three million, six hundred forty-three thousand, nine hundred seventy-five".