35681881 has 2 divisors, whose sum is σ = 35681882. Its totient is φ = 35681880.

The previous prime is 35681869. The next prime is 35681923. The reversal of 35681881 is 18818653.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27931225 + 7750656 = 5285^2 + 2784^2 .

It is a cyclic number.

It is not a de Polignac number, because 35681881 - 2²¹ = 33584729 is a prime.

It is a super-2 number, since 2×35681881² = 2546393263396322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (35681081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17840940 + 17840941.

It is an arithmetic number, because the mean of its divisors is an integer number (17840941).

Almost surely, 2^35681881 is an apocalyptic number.

It is an amenable number.

35681881 is a deficient number, since it is larger than the sum of its proper divisors (1).

35681881 is an equidigital number, since it uses as much as digits as its factorization.

35681881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46080, while the sum is 40.

The square root of 35681881 is about 5973.4312584979. The cubic root of 35681881 is about 329.2172479517.

The spelling of 35681881 in words is "thirty-five million, six hundred eighty-one thousand, eight hundred eighty-one".