3969609091 has 4 divisors (see below), whose sum is σ = 4536696112. Its totient is φ = 3402522072.

The previous prime is 3969609079. The next prime is 3969609109. The reversal of 3969609091 is 1909069693.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1909069693 = 3877 ⋅492409.

It is a cyclic number.

It is not a de Polignac number, because 3969609091 - 2¹¹ = 3969607043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3969609071) 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, 283543500 + ... + 283543513.

It is an arithmetic number, because the mean of its divisors is an integer number (1134174028).

Almost surely, 2^3969609091 is an apocalyptic number.

3969609091 is a deficient number, since it is larger than the sum of its proper divisors (567087021).

3969609091 is an equidigital number, since it uses as much as digits as its factorization.

3969609091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 567087020.

The product of its (nonzero) digits is 708588, while the sum is 52.

The square root of 3969609091 is about 63004.8338701087. The cubic root of 3969609091 is about 1583.3706138689.

The spelling of 3969609091 in words is "three billion, nine hundred sixty-nine million, six hundred nine thousand, ninety-one".