3706691081 has 2 divisors, whose sum is σ = 3706691082. Its totient is φ = 3706691080.

The previous prime is 3706691069. The next prime is 3706691083. The reversal of 3706691081 is 1801966073.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2643605056 + 1063086025 = 51416^2 + 32605^2 .

It is a cyclic number.

It is not a de Polignac number, because 3706691081 - 2²⁶ = 3639582217 is a prime.

It is a super-2 number, since 2×3706691081² = 27479117539929897122, which contains 22 as substring.

Together with 3706691083, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3706691083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1853345540 + 1853345541.

It is an arithmetic number, because the mean of its divisors is an integer number (1853345541).

Almost surely, 2^3706691081 is an apocalyptic number.

It is an amenable number.

3706691081 is a deficient number, since it is larger than the sum of its proper divisors (1).

3706691081 is an equidigital number, since it uses as much as digits as its factorization.

3706691081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 3706691081 is about 60882.6008067987. The cubic root of 3706691081 is about 1547.6121513906.

The spelling of 3706691081 in words is "three billion, seven hundred six million, six hundred ninety-one thousand, eighty-one".