7863674981 has 4 divisors (see below), whose sum is σ = 7864066764. Its totient is φ = 7863283200.

The previous prime is 7863674911. The next prime is 7863675007. The reversal of 7863674981 is 1894763687.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1894763687 = 47 ⋅40314121.

It can be written as a sum of positive squares in 2 ways, for example, as 5530301956 + 2333373025 = 74366^2 + 48305^2 .

It is a cyclic number.

It is not a de Polignac number, because 7863674981 - 2²⁶ = 7796566117 is a prime.

It is a super-2 number, since 2×7863674981² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7863674981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7863674911) 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, 164060 + ... + 206501.

It is an arithmetic number, because the mean of its divisors is an integer number (1966016691).

Almost surely, 2^7863674981 is an apocalyptic number.

It is an amenable number.

7863674981 is a deficient number, since it is larger than the sum of its proper divisors (391783).

7863674981 is a wasteful number, since it uses less digits than its factorization.

7863674981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391782.

The product of its digits is 12192768, while the sum is 59.

The square root of 7863674981 is about 88677.3645357145. The cubic root of 7863674981 is about 1988.5744342684.

The spelling of 7863674981 in words is "seven billion, eight hundred sixty-three million, six hundred seventy-four thousand, nine hundred eighty-one".