3949968306131 has 4 divisors (see below), whose sum is σ = 3965337832872. Its totient is φ = 3934598779392.

The previous prime is 3949968306121. The next prime is 3949968306139. The reversal of 3949968306131 is 1316038699493.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3949968306131 is a prime.

It is a super-2 number, since 2×3949968306131² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3949968306139) 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, 7684762985 + ... + 7684763498.

It is an arithmetic number, because the mean of its divisors is an integer number (991334458218).

Almost surely, 2^{3949968306131} is an apocalyptic number.

3949968306131 is a deficient number, since it is larger than the sum of its proper divisors (15369526741).

3949968306131 is a wasteful number, since it uses less digits than its factorization.

3949968306131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15369526740.

The product of its (nonzero) digits is 22674816, while the sum is 62.

The spelling of 3949968306131 in words is "three trillion, nine hundred forty-nine billion, nine hundred sixty-eight million, three hundred six thousand, one hundred thirty-one".