97857812 has 12 divisors (see below), whose sum is σ = 184424436. Its totient is φ = 45165120.

The previous prime is 97857811. The next prime is 97857821. The reversal of 97857812 is 21875879.

It can be written as a sum of positive squares in 2 ways, for example, as 22619536 + 75238276 = 4756^2 + 8674^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97857811) 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, 940889 + ... + 940992.

It is an arithmetic number, because the mean of its divisors is an integer number (15368703).

Almost surely, 2^97857812 is an apocalyptic number.

It is an amenable number.

97857812 is a deficient number, since it is larger than the sum of its proper divisors (86566624).

97857812 is a wasteful number, since it uses less digits than its factorization.

97857812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1881898 (or 1881896 counting only the distinct ones).

The product of its digits is 282240, while the sum is 47.

The square root of 97857812 is about 9892.3107512856. The cubic root of 97857812 is about 460.8205455269.

The spelling of 97857812 in words is "ninety-seven million, eight hundred fifty-seven thousand, eight hundred twelve".