73708381 has 2 divisors, whose sum is σ = 73708382. Its totient is φ = 73708380.

The previous prime is 73708373. The next prime is 73708417. The reversal of 73708381 is 18380737.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71132356 + 2576025 = 8434^2 + 1605^2 .

It is a cyclic number.

It is not a de Polignac number, because 73708381 - 2³ = 73708373 is a prime.

It is a super-2 number, since 2×73708381² = 10865850859282322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 73708381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73708301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36854190 + 36854191.

It is an arithmetic number, because the mean of its divisors is an integer number (36854191).

Almost surely, 2^73708381 is an apocalyptic number.

It is an amenable number.

73708381 is a deficient number, since it is larger than the sum of its proper divisors (1).

73708381 is an equidigital number, since it uses as much as digits as its factorization.

73708381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 73708381 is about 8585.3585248375. The cubic root of 73708381 is about 419.2814262514.

It can be divided in two parts, 7370 and 8381, that added together give a palindrome (15751).

The spelling of 73708381 in words is "seventy-three million, seven hundred eight thousand, three hundred eighty-one".