97189879 has 2 divisors, whose sum is σ = 97189880. Its totient is φ = 97189878.

The previous prime is 97189877. The next prime is 97189889. The reversal of 97189879 is 97898179.

It is a weak prime.

It is an emirp because it is prime and its reverse (97898179) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97189879 - 2¹ = 97189877 is a prime.

Together with 97189877, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97189871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48594939 + 48594940.

It is an arithmetic number, because the mean of its divisors is an integer number (48594940).

Almost surely, 2^97189879 is an apocalyptic number.

97189879 is a deficient number, since it is larger than the sum of its proper divisors (1).

97189879 is an equidigital number, since it uses as much as digits as its factorization.

97189879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2286144, while the sum is 58.

The square root of 97189879 is about 9858.4927346933. The cubic root of 97189879 is about 459.7697004094.

The spelling of 97189879 in words is "ninety-seven million, one hundred eighty-nine thousand, eight hundred seventy-nine".