3949685131 has 16 divisors (see below), whose sum is σ = 4764888000. Its totient is φ = 3268696704.

The previous prime is 3949685119. The next prime is 3949685137. The reversal of 3949685131 is 1315869493.

It is not a de Polignac number, because 3949685131 - 2⁵ = 3949685099 is a prime.

It is a super-2 number, since 2×3949685131² = 31200025268084974322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3949685137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 188590 + ... + 208483.

It is an arithmetic number, because the mean of its divisors is an integer number (297805500).

Almost surely, 2^3949685131 is an apocalyptic number.

3949685131 is a deficient number, since it is larger than the sum of its proper divisors (815202869).

3949685131 is an equidigital number, since it uses as much as digits as its factorization.

3949685131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397123 (or 397109 counting only the distinct ones).

The product of its digits is 699840, while the sum is 49.

The square root of 3949685131 is about 62846.5204366956. The cubic root of 3949685131 is about 1580.7171250600.

The spelling of 3949685131 in words is "three billion, nine hundred forty-nine million, six hundred eighty-five thousand, one hundred thirty-one".