3959261291 has 4 divisors (see below), whose sum is σ = 4192159032. Its totient is φ = 3726363552.

The previous prime is 3959261237. The next prime is 3959261311. The reversal of 3959261291 is 1921629593.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1921629593 = 13 ⋅147817661.

It is not a de Polignac number, because 3959261291 - 2¹⁸ = 3958999147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3959261191) 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, 116448845 + ... + 116448878.

It is an arithmetic number, because the mean of its divisors is an integer number (1048039758).

Almost surely, 2^3959261291 is an apocalyptic number.

3959261291 is a deficient number, since it is larger than the sum of its proper divisors (232897741).

3959261291 is a wasteful number, since it uses less digits than its factorization.

3959261291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232897740.

The product of its digits is 262440, while the sum is 47.

The square root of 3959261291 is about 62922.6611881602. The cubic root of 3959261291 is about 1581.9935966844.

The spelling of 3959261291 in words is "three billion, nine hundred fifty-nine million, two hundred sixty-one thousand, two hundred ninety-one".