7849136247 has 4 divisors (see below), whose sum is σ = 10465515000. Its totient is φ = 5232757496.

The previous prime is 7849136231. The next prime is 7849136257. The reversal of 7849136247 is 7426319487.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7849136247 - 2⁴ = 7849136231 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7849136247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7849136257) 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, 1308189372 + ... + 1308189377.

It is an arithmetic number, because the mean of its divisors is an integer number (2616378750).

Almost surely, 2^7849136247 is an apocalyptic number.

7849136247 is a deficient number, since it is larger than the sum of its proper divisors (2616378753).

7849136247 is a wasteful number, since it uses less digits than its factorization.

7849136247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2616378752.

The product of its digits is 2032128, while the sum is 51.

The square root of 7849136247 is about 88595.3511590761. The cubic root of 7849136247 is about 1987.3481547535.

The spelling of 7849136247 in words is "seven billion, eight hundred forty-nine million, one hundred thirty-six thousand, two hundred forty-seven".