97871971 has 4 divisors (see below), whose sum is σ = 97987032. Its totient is φ = 97756912.

The previous prime is 97871959. The next prime is 97871987. The reversal of 97871971 is 17917879.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 97871971 - 2¹⁷ = 97740899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97871951) 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, 56245 + ... + 57958.

It is an arithmetic number, because the mean of its divisors is an integer number (24496758).

Almost surely, 2^97871971 is an apocalyptic number.

97871971 is a deficient number, since it is larger than the sum of its proper divisors (115061).

97871971 is a wasteful number, since it uses less digits than its factorization.

97871971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115060.

The product of its digits is 222264, while the sum is 49.

The square root of 97871971 is about 9893.0263822553. The cubic root of 97871971 is about 460.8427697565.

The spelling of 97871971 in words is "ninety-seven million, eight hundred seventy-one thousand, nine hundred seventy-one".