73505623 has 4 divisors (see below), whose sum is σ = 77374360. Its totient is φ = 69636888.

The previous prime is 73505611. The next prime is 73505639. The reversal of 73505623 is 32650537.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 73505623 - 2⁵ = 73505591 is a prime.

It is a super-2 number, since 2×73505623² = 10806153225236258, 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 (73505323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1934340 + ... + 1934377.

It is an arithmetic number, because the mean of its divisors is an integer number (19343590).

Almost surely, 2^73505623 is an apocalyptic number.

73505623 is a deficient number, since it is larger than the sum of its proper divisors (3868737).

73505623 is a wasteful number, since it uses less digits than its factorization.

73505623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3868736.

The product of its (nonzero) digits is 18900, while the sum is 31.

The square root of 73505623 is about 8573.5420334888. The cubic root of 73505623 is about 418.8966182059.

The spelling of 73505623 in words is "seventy-three million, five hundred five thousand, six hundred twenty-three".