36735781 has 2 divisors, whose sum is σ = 36735782. Its totient is φ = 36735780.

The previous prime is 36735773. The next prime is 36735823. The reversal of 36735781 is 18753763.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29062881 + 7672900 = 5391^2 + 2770^2 .

It is a cyclic number.

It is not a de Polignac number, because 36735781 - 2³ = 36735773 is a prime.

It is a super-2 number, since 2×36735781² = 2699035211359922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36735581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18367890 + 18367891.

It is an arithmetic number, because the mean of its divisors is an integer number (18367891).

Almost surely, 2^36735781 is an apocalyptic number.

It is an amenable number.

36735781 is a deficient number, since it is larger than the sum of its proper divisors (1).

36735781 is an equidigital number, since it uses as much as digits as its factorization.

36735781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 105840, while the sum is 40.

The square root of 36735781 is about 6061.0049496762. The cubic root of 36735781 is about 332.4271036985.

The spelling of 36735781 in words is "thirty-six million, seven hundred thirty-five thousand, seven hundred eighty-one".