73717381 has 4 divisors (see below), whose sum is σ = 74477452. Its totient is φ = 72957312.

The previous prime is 73717339. The next prime is 73717403. The reversal of 73717381 is 18371737.

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

It can be written as a sum of positive squares in 2 ways, for example, as 15729156 + 57988225 = 3966^2 + 7615^2 .

It is a cyclic number.

It is not a de Polignac number, because 73717381 - 2¹¹ = 73715333 is a prime.

It is a super-2 number, since 2×73717381² = 10868504522998322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 73717381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73717481) 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, 379890 + ... + 380083.

It is an arithmetic number, because the mean of its divisors is an integer number (18619363).

Almost surely, 2^73717381 is an apocalyptic number.

It is an amenable number.

73717381 is a deficient number, since it is larger than the sum of its proper divisors (760071).

73717381 is an equidigital number, since it uses as much as digits as its factorization.

73717381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760070.

The product of its digits is 24696, while the sum is 37.

The square root of 73717381 is about 8585.8826570132. The cubic root of 73717381 is about 419.2984907029.

The spelling of 73717381 in words is "seventy-three million, seven hundred seventeen thousand, three hundred eighty-one".