97821171 has 24 divisors (see below), whose sum is σ = 161763680. Its totient is φ = 55800576.

The previous prime is 97821169. The next prime is 97821181. The reversal of 97821171 is 17112879.

It is not a de Polignac number, because 97821171 - 2¹ = 97821169 is a prime.

It is a super-2 number, since 2×97821171² = 19137962991622482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97821181) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51291 + ... + 53163.

Almost surely, 2^97821171 is an apocalyptic number.

97821171 is a deficient number, since it is larger than the sum of its proper divisors (63942509).

97821171 is a wasteful number, since it uses less digits than its factorization.

97821171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2715 (or 2712 counting only the distinct ones).

The product of its digits is 7056, while the sum is 36.

The square root of 97821171 is about 9890.4585839080. The cubic root of 97821171 is about 460.7630231785.

The spelling of 97821171 in words is "ninety-seven million, eight hundred twenty-one thousand, one hundred seventy-one".