73563813 has 12 divisors (see below), whose sum is σ = 107540160. Its totient is φ = 48451176.

The previous prime is 73563797. The next prime is 73563827. The reversal of 73563813 is 31836537.

73563813 is a `hidden beast` number, since 7 + 3 + 5 + 638 + 13 = 666.

It is not a de Polignac number, because 73563813 - 2⁴ = 73563797 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73563013) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48493 + ... + 49986.

It is an arithmetic number, because the mean of its divisors is an integer number (8961680).

Almost surely, 2^73563813 is an apocalyptic number.

It is an amenable number.

73563813 is a deficient number, since it is larger than the sum of its proper divisors (33976347).

73563813 is a wasteful number, since it uses less digits than its factorization.

73563813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98568 (or 98565 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The square root of 73563813 is about 8576.9349420408. The cubic root of 73563813 is about 419.0071275058.

The spelling of 73563813 in words is "seventy-three million, five hundred sixty-three thousand, eight hundred thirteen".