2691942387 has 8 divisors (see below), whose sum is σ = 3621020304. Its totient is φ = 1778746368.

The previous prime is 2691942377. The next prime is 2691942391. The reversal of 2691942387 is 7832491962.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2691942387 - 2¹⁹ = 2691418099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2691942307) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3970078 + ... + 3970755.

It is an arithmetic number, because the mean of its divisors is an integer number (452627538).

Almost surely, 2^2691942387 is an apocalyptic number.

2691942387 is a deficient number, since it is larger than the sum of its proper divisors (929077917).

2691942387 is a wasteful number, since it uses less digits than its factorization.

2691942387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7940949.

The product of its digits is 1306368, while the sum is 51.

The square root of 2691942387 is about 51883.9318768345. The cubic root of 2691942387 is about 1391.0900799822.

The spelling of 2691942387 in words is "two billion, six hundred ninety-one million, nine hundred forty-two thousand, three hundred eighty-seven".