35724581 has 2 divisors, whose sum is σ = 35724582. Its totient is φ = 35724580.

The previous prime is 35724553. The next prime is 35724583. The reversal of 35724581 is 18542753.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21473956 + 14250625 = 4634^2 + 3775^2 .

It is a cyclic number.

It is not a de Polignac number, because 35724581 - 2⁶ = 35724517 is a prime.

It is a super-2 number, since 2×35724581² = 2552491375251122, which contains 22 as substring.

Together with 35724583, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (35724583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17862290 + 17862291.

It is an arithmetic number, because the mean of its divisors is an integer number (17862291).

Almost surely, 2^35724581 is an apocalyptic number.

It is an amenable number.

35724581 is a deficient number, since it is larger than the sum of its proper divisors (1).

35724581 is an equidigital number, since it uses as much as digits as its factorization.

35724581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 33600, while the sum is 35.

The square root of 35724581 is about 5977.0043500068. The cubic root of 35724581 is about 329.3485188033.

The spelling of 35724581 in words is "thirty-five million, seven hundred twenty-four thousand, five hundred eighty-one".