97721167 has 4 divisors (see below), whose sum is σ = 97841016. Its totient is φ = 97601320.

The previous prime is 97721149. The next prime is 97721171. The reversal of 97721167 is 76112779.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76112779 = 5737 ⋅13267.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97721167 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 (97721137) 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, 58693 + ... + 60334.

It is an arithmetic number, because the mean of its divisors is an integer number (24460254).

Almost surely, 2^97721167 is an apocalyptic number.

97721167 is a deficient number, since it is larger than the sum of its proper divisors (119849).

97721167 is a wasteful number, since it uses less digits than its factorization.

97721167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119848.

The product of its digits is 37044, while the sum is 40.

The square root of 97721167 is about 9885.4017116150. The cubic root of 97721167 is about 460.6059547378.

The spelling of 97721167 in words is "ninety-seven million, seven hundred twenty-one thousand, one hundred sixty-seven".