3491987279 has 12 divisors (see below), whose sum is σ = 3840978288. Its totient is φ = 3172319040.

The previous prime is 3491987269. The next prime is 3491987347. The reversal of 3491987279 is 9727891943.

It is not a de Polignac number, because 3491987279 - 2⁴ = 3491987263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3491987209) 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, 178622 + ... + 197204.

It is an arithmetic number, because the mean of its divisors is an integer number (320081524).

Almost surely, 2^3491987279 is an apocalyptic number.

3491987279 is a deficient number, since it is larger than the sum of its proper divisors (348991009).

3491987279 is a wasteful number, since it uses less digits than its factorization.

3491987279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20158 (or 20147 counting only the distinct ones).

The product of its digits is 6858432, while the sum is 59.

The square root of 3491987279 is about 59093.0391755239. The cubic root of 3491987279 is about 1517.1349653894.

The spelling of 3491987279 in words is "three billion, four hundred ninety-one million, nine hundred eighty-seven thousand, two hundred seventy-nine".