35997581 has 2 divisors, whose sum is σ = 35997582. Its totient is φ = 35997580.

The previous prime is 35997539. The next prime is 35997587. The reversal of 35997581 is 18579953.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29702500 + 6295081 = 5450^2 + 2509^2 .

It is a cyclic number.

It is not a de Polignac number, because 35997581 - 2¹⁸ = 35735437 is a prime.

It is a super-2 number, since 2×35997581² = 2591651675703122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (35997587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17998790 + 17998791.

It is an arithmetic number, because the mean of its divisors is an integer number (17998791).

Almost surely, 2^35997581 is an apocalyptic number.

It is an amenable number.

35997581 is a deficient number, since it is larger than the sum of its proper divisors (1).

35997581 is an equidigital number, since it uses as much as digits as its factorization.

35997581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 340200, while the sum is 47.

The square root of 35997581 is about 5999.7984132802. The cubic root of 35997581 is about 330.1853290182.

The spelling of 35997581 in words is "thirty-five million, nine hundred ninety-seven thousand, five hundred eighty-one".