97857679 has 2 divisors, whose sum is σ = 97857680. Its totient is φ = 97857678.

The previous prime is 97857677. The next prime is 97857737. The reversal of 97857679 is 97675879.

It is an a-pointer prime, because the next prime (97857737) can be obtained adding 97857679 to its sum of digits (58).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 97857679 - 2¹ = 97857677 is a prime.

It is a super-2 number, since 2×97857679² = 19152250678534082, which contains 22 as substring.

Together with 97857677, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97857671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48928839 + 48928840.

It is an arithmetic number, because the mean of its divisors is an integer number (48928840).

Almost surely, 2^97857679 is an apocalyptic number.

97857679 is a deficient number, since it is larger than the sum of its proper divisors (1).

97857679 is an equidigital number, since it uses as much as digits as its factorization.

97857679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6667920, while the sum is 58.

The square root of 97857679 is about 9892.3040288903. The cubic root of 97857679 is about 460.8203367575.

The spelling of 97857679 in words is "ninety-seven million, eight hundred fifty-seven thousand, six hundred seventy-nine".