97188872447 has 4 divisors (see below), whose sum is σ = 102304076280. Its totient is φ = 92073668616.

The previous prime is 97188872437. The next prime is 97188872461. The reversal of 97188872447 is 74427888179.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74427888179 = 4283 ⋅17377513.

It is a cyclic number.

It is not a de Polignac number, because 97188872447 - 2⁸ = 97188872191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97188872437) 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, 2557601888 + ... + 2557601925.

It is an arithmetic number, because the mean of its divisors is an integer number (25576019070).

Almost surely, 2^97188872447 is an apocalyptic number.

97188872447 is a deficient number, since it is larger than the sum of its proper divisors (5115203833).

97188872447 is a wasteful number, since it uses less digits than its factorization.

97188872447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5115203832.

The product of its digits is 50577408, while the sum is 65.

The spelling of 97188872447 in words is "ninety-seven billion, one hundred eighty-eight million, eight hundred seventy-two thousand, four hundred forty-seven".