36706781 has 6 divisors (see below), whose sum is σ = 38372670. Its totient is φ = 35110328.

The previous prime is 36706777. The next prime is 36706799. The reversal of 36706781 is 18760763.

It can be written as a sum of positive squares in only one way, i.e., 33062500 + 3644281 = 5750^2 + 1909^2 .

It is not a de Polignac number, because 36706781 - 2² = 36706777 is a prime.

It is a super-2 number, since 2×36706781² = 2694775542763922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36706711) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34166 + ... + 35223.

It is an arithmetic number, because the mean of its divisors is an integer number (6395445).

Almost surely, 2^36706781 is an apocalyptic number.

It is an amenable number.

36706781 is a deficient number, since it is larger than the sum of its proper divisors (1665889).

36706781 is an equidigital number, since it uses as much as digits as its factorization.

36706781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69435 (or 69412 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 36706781 is about 6058.6121348045. The cubic root of 36706781 is about 332.3396056822.

The spelling of 36706781 in words is "thirty-six million, seven hundred six thousand, seven hundred eighty-one".