3943679149 has 4 divisors (see below), whose sum is σ = 4027587264. Its totient is φ = 3859771036.

The previous prime is 3943679147. The next prime is 3943679183. The reversal of 3943679149 is 9419763493.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9419763493 = 7 ⋅1345680499.

It is not a de Polignac number, because 3943679149 - 2¹ = 3943679147 is a prime.

It is a super-3 number, since 3×3943679149³ (a number of 30 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3943679149.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3943679147) 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, 41953987 + ... + 41954080.

It is an arithmetic number, because the mean of its divisors is an integer number (1006896816).

Almost surely, 2^3943679149 is an apocalyptic number.

It is an amenable number.

3943679149 is a deficient number, since it is larger than the sum of its proper divisors (83908115).

3943679149 is an equidigital number, since it uses as much as digits as its factorization.

3943679149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83908114.

The product of its digits is 4408992, while the sum is 55.

The square root of 3943679149 is about 62798.7193261136. The cubic root of 3943679149 is about 1579.9154936643.

The spelling of 3943679149 in words is "three billion, nine hundred forty-three million, six hundred seventy-nine thousand, one hundred forty-nine".