738581 has 2 divisors, whose sum is σ = 738582. Its totient is φ = 738580.

The previous prime is 738547. The next prime is 738583. The reversal of 738581 is 185837.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 654481 + 84100 = 809^2 + 290^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-738581 is a prime.

It is a super-2 number, since 2×738581² = 1091003787122, which contains 22 as substring.

Together with 738583, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 738581.

It is not a weakly prime, because it can be changed into another prime (738583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 369290 + 369291.

It is an arithmetic number, because the mean of its divisors is an integer number (369291).

2⁷³⁸⁵⁸¹ is an apocalyptic number.

It is an amenable number.

738581 is a deficient number, since it is larger than the sum of its proper divisors (1).

738581 is an equidigital number, since it uses as much as digits as its factorization.

738581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6720, while the sum is 32.

The square root of 738581 is about 859.4073539364. The cubic root of 738581 is about 90.3925650423.

The spelling of 738581 in words is "seven hundred thirty-eight thousand, five hundred eighty-one".