3949685099 has 2 divisors, whose sum is σ = 3949685100. Its totient is φ = 3949685098.

The previous prime is 3949685053. The next prime is 3949685101. The reversal of 3949685099 is 9905869493.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3949685099 - 2²⁸ = 3681249643 is a prime.

Together with 3949685101, 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 (3949685009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1974842549 + 1974842550.

It is an arithmetic number, because the mean of its divisors is an integer number (1974842550).

Almost surely, 2^3949685099 is an apocalyptic number.

3949685099 is a deficient number, since it is larger than the sum of its proper divisors (1).

3949685099 is an equidigital number, since it uses as much as digits as its factorization.

3949685099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18895680, while the sum is 62.

The square root of 3949685099 is about 62846.5201821071. The cubic root of 3949685099 is about 1580.7171207910.

The spelling of 3949685099 in words is "three billion, nine hundred forty-nine million, six hundred eighty-five thousand, ninety-nine".