7881977213 has 8 divisors (see below), whose sum is σ = 8605486560. Its totient is φ = 7159628880.

The previous prime is 7881977179. The next prime is 7881977231. The reversal of 7881977213 is 3127791887.

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

It is a cyclic number.

It is not a de Polignac number, because 7881977213 - 2¹² = 7881973117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7881977263) 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, 276023 + ... + 303236.

It is an arithmetic number, because the mean of its divisors is an integer number (1075685820).

Almost surely, 2^7881977213 is an apocalyptic number.

It is an amenable number.

7881977213 is a deficient number, since it is larger than the sum of its proper divisors (723509347).

7881977213 is a wasteful number, since it uses less digits than its factorization.

7881977213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580507.

The product of its digits is 1185408, while the sum is 53.

The square root of 7881977213 is about 88780.5001844437. The cubic root of 7881977213 is about 1990.1160015037.

The spelling of 7881977213 in words is "seven billion, eight hundred eighty-one million, nine hundred seventy-seven thousand, two hundred thirteen".