97871947 has 4 divisors (see below), whose sum is σ = 98030680. Its totient is φ = 97713216.

The previous prime is 97871909. The next prime is 97871951. The reversal of 97871947 is 74917879.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74917879 = 1091 ⋅68669.

It is a cyclic number.

It is not a de Polignac number, because 97871947 - 2⁷ = 97871819 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 97871894 and 97871903.

It is not an unprimeable number, because it can be changed into a prime (97871957) 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, 78438 + ... + 79675.

It is an arithmetic number, because the mean of its divisors is an integer number (24507670).

Almost surely, 2^97871947 is an apocalyptic number.

97871947 is a deficient number, since it is larger than the sum of its proper divisors (158733).

97871947 is a wasteful number, since it uses less digits than its factorization.

97871947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158732.

The product of its digits is 889056, while the sum is 52.

The square root of 97871947 is about 9893.0251692796. The cubic root of 97871947 is about 460.8427320875.

The spelling of 97871947 in words is "ninety-seven million, eight hundred seventy-one thousand, nine hundred forty-seven".