7857130897 has 16 divisors (see below), whose sum is σ = 9810146304. Its totient is φ = 6113538000.

The previous prime is 7857130871. The next prime is 7857130943. The reversal of 7857130897 is 7980317587.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 7857130897 - 2²³ = 7848742289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7857130837) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20629 + ... + 127042.

It is an arithmetic number, because the mean of its divisors is an integer number (613134144).

Almost surely, 2^7857130897 is an apocalyptic number.

7857130897 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

It is an amenable number.

7857130897 is a deficient number, since it is larger than the sum of its proper divisors (1953015407).

7857130897 is a wasteful number, since it uses less digits than its factorization.

7857130897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148380.

The product of its (nonzero) digits is 2963520, while the sum is 55.

The square root of 7857130897 is about 88640.4585784618. The cubic root of 7857130897 is about 1988.0226562206.

The spelling of 7857130897 in words is "seven billion, eight hundred fifty-seven million, one hundred thirty thousand, eight hundred ninety-seven".