3694539691 has 4 divisors (see below), whose sum is σ = 3721507272. Its totient is φ = 3667572112.

The previous prime is 3694539689. The next prime is 3694539707. The reversal of 3694539691 is 1969354963.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1969354963 = 1283 ⋅1534961.

It is a cyclic number.

It is not a de Polignac number, because 3694539691 - 2¹ = 3694539689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3694539391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13483585 + ... + 13483858.

It is an arithmetic number, because the mean of its divisors is an integer number (930376818).

Almost surely, 2^3694539691 is an apocalyptic number.

3694539691 is a deficient number, since it is larger than the sum of its proper divisors (26967581).

3694539691 is a wasteful number, since it uses less digits than its factorization.

3694539691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26967580.

The product of its digits is 4723920, while the sum is 55.

The square root of 3694539691 is about 60782.7252679575. The cubic root of 3694539691 is about 1545.9191566000.

It can be divided in two parts, 36945 and 39691, that added together give a triangular number (76636 = T₃₉₁).

The spelling of 3694539691 in words is "three billion, six hundred ninety-four million, five hundred thirty-nine thousand, six hundred ninety-one".