2647077491 has 4 divisors (see below), whose sum is σ = 2649958800. Its totient is φ = 2644196184.

The previous prime is 2647077469. The next prime is 2647077509. The reversal of 2647077491 is 1947707462.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1947707462 = 2 ⋅973853731.

It is a cyclic number.

It is not a de Polignac number, because 2647077491 - 2³⁰ = 1573335667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2647077091) 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, 1439276 + ... + 1441113.

It is an arithmetic number, because the mean of its divisors is an integer number (662489700).

Almost surely, 2^2647077491 is an apocalyptic number.

2647077491 is a deficient number, since it is larger than the sum of its proper divisors (2881309).

2647077491 is an equidigital number, since it uses as much as digits as its factorization.

2647077491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2881308.

The product of its (nonzero) digits is 592704, while the sum is 47.

The square root of 2647077491 is about 51449.7569576378. The cubic root of 2647077491 is about 1383.3186060399.

The spelling of 2647077491 in words is "two billion, six hundred forty-seven million, seventy-seven thousand, four hundred ninety-one".