73403681 has 8 divisors (see below), whose sum is σ = 79525824. Its totient is φ = 67349520.

The previous prime is 73403677. The next prime is 73403689. The reversal of 73403681 is 18630437.

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 73403681 - 2² = 73403677 is a prime.

It is a super-2 number, since 2×73403681² = 10776200768699522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (73403689) 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, 14735 + ... + 19076.

It is an arithmetic number, because the mean of its divisors is an integer number (9940728).

Almost surely, 2^73403681 is an apocalyptic number.

It is an amenable number.

73403681 is a deficient number, since it is larger than the sum of its proper divisors (6122143).

73403681 is a wasteful number, since it uses less digits than its factorization.

73403681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33991.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 73403681 is about 8567.5948200180. The cubic root of 73403681 is about 418.7028783094.

The spelling of 73403681 in words is "seventy-three million, four hundred three thousand, six hundred eighty-one".