73818681 has 4 divisors (see below), whose sum is σ = 98424912. Its totient is φ = 49212452.

The previous prime is 73818677. The next prime is 73818683. The reversal of 73818681 is 18681837.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 73818681 - 2² = 73818677 is a prime.

It is a super-2 number, since 2×73818681² = 10898395329159522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (73818683) 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, 12303111 + ... + 12303116.

It is an arithmetic number, because the mean of its divisors is an integer number (24606228).

Almost surely, 2^73818681 is an apocalyptic number.

It is an amenable number.

73818681 is a deficient number, since it is larger than the sum of its proper divisors (24606231).

73818681 is a wasteful number, since it uses less digits than its factorization.

73818681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24606230.

The product of its digits is 64512, while the sum is 42.

The square root of 73818681 is about 8591.7798505316. The cubic root of 73818681 is about 419.4904648591.

The spelling of 73818681 in words is "seventy-three million, eight hundred eighteen thousand, six hundred eighty-one".