7857242953 has 12 divisors (see below), whose sum is σ = 9194798592. Its totient is φ = 6694444680.

The previous prime is 7857242947. The next prime is 7857242963. The reversal of 7857242953 is 3592427587.

It is a happy number.

It is not a de Polignac number, because 7857242953 - 2⁹ = 7857242441 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7857242953.

It is not an unprimeable number, because it can be changed into a prime (7857242963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 471913 + ... + 488278.

It is an arithmetic number, because the mean of its divisors is an integer number (766233216).

Almost surely, 2^7857242953 is an apocalyptic number.

It is an amenable number.

7857242953 is a deficient number, since it is larger than the sum of its proper divisors (1337555639).

7857242953 is a wasteful number, since it uses less digits than its factorization.

7857242953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 960372 (or 960365 counting only the distinct ones).

The product of its digits is 4233600, while the sum is 52.

The square root of 7857242953 is about 88641.0906577756. The cubic root of 7857242953 is about 1988.0321070329.

The spelling of 7857242953 in words is "seven billion, eight hundred fifty-seven million, two hundred forty-two thousand, nine hundred fifty-three".