73537381 has 2 divisors, whose sum is σ = 73537382. Its totient is φ = 73537380.

The previous prime is 73537379. The next prime is 73537421. The reversal of 73537381 is 18373537.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73256481 + 280900 = 8559^2 + 530^2 .

It is a cyclic number.

It is not a de Polignac number, because 73537381 - 2¹ = 73537379 is a prime.

It is a super-2 number, since 2×73537381² = 10815492808678322, which contains 22 as substring.

Together with 73537379, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 73537381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73537351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36768690 + 36768691.

It is an arithmetic number, because the mean of its divisors is an integer number (36768691).

Almost surely, 2^73537381 is an apocalyptic number.

It is an amenable number.

73537381 is a deficient number, since it is larger than the sum of its proper divisors (1).

73537381 is an equidigital number, since it uses as much as digits as its factorization.

73537381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52920, while the sum is 37.

The square root of 73537381 is about 8575.3939268118. The cubic root of 73537381 is about 418.9569374161.

The spelling of 73537381 in words is "seventy-three million, five hundred thirty-seven thousand, three hundred eighty-one".