73837681 has 8 divisors (see below), whose sum is σ = 80294760. Its totient is φ = 67615488.

The previous prime is 73837651. The next prime is 73837717. The reversal of 73837681 is 18673837.

It can be written as a sum of positive squares in 4 ways, for example, as 35892081 + 37945600 = 5991^2 + 6160^2 .

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 73837681 - 2¹³ = 73829489 is a prime.

It is a super-2 number, since 2×73837681² = 10904006270915522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73837651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58066 + ... + 59323.

It is an arithmetic number, because the mean of its divisors is an integer number (10036845).

Almost surely, 2^73837681 is an apocalyptic number.

It is an amenable number.

73837681 is a deficient number, since it is larger than the sum of its proper divisors (6457079).

73837681 is a wasteful number, since it uses less digits than its factorization.

73837681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117443.

The product of its digits is 169344, while the sum is 43.

The square root of 73837681 is about 8592.8854874250. The cubic root of 73837681 is about 419.5264522948.

The spelling of 73837681 in words is "seventy-three million, eight hundred thirty-seven thousand, six hundred eighty-one".