3949559494 has 24 divisors (see below), whose sum is σ = 6199550280. Its totient is φ = 1886959008.

The previous prime is 3949559491. The next prime is 3949559569. The reversal of 3949559494 is 4949559493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3949559491) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1889602 + ... + 1891690.

It is an arithmetic number, because the mean of its divisors is an integer number (258314595).

Almost surely, 2^3949559494 is an apocalyptic number.

3949559494 is a deficient number, since it is larger than the sum of its proper divisors (2249990786).

3949559494 is a wasteful number, since it uses less digits than its factorization.

3949559494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3924 (or 3901 counting only the distinct ones).

The product of its digits is 31492800, while the sum is 61.

The square root of 3949559494 is about 62845.5208746017. The cubic root of 3949559494 is about 1580.7003643431.

Subtracting 3949559494 from its reverse (4949559493), we obtain a palindrome (999999999).

It can be divided in two parts, 39495 and 59494, that added together give a palindrome (98989).

The spelling of 3949559494 in words is "three billion, nine hundred forty-nine million, five hundred fifty-nine thousand, four hundred ninety-four".