97066191 has 4 divisors (see below), whose sum is σ = 129421592. Its totient is φ = 64710792.

The previous prime is 97066171. The next prime is 97066201. The reversal of 97066191 is 19166079.

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

It is not a de Polignac number, because 97066191 - 2¹⁵ = 97033423 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 (97066171) 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, 16177696 + ... + 16177701.

It is an arithmetic number, because the mean of its divisors is an integer number (32355398).

Almost surely, 2^97066191 is an apocalyptic number.

97066191 is a deficient number, since it is larger than the sum of its proper divisors (32355401).

97066191 is a wasteful number, since it uses less digits than its factorization.

97066191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32355400.

The product of its (nonzero) digits is 20412, while the sum is 39.

The square root of 97066191 is about 9852.2175676342. The cubic root of 97066191 is about 459.5745767451.

It can be divided in two parts, 970 and 66191, that added together give a triangular number (67161 = T₃₆₆).

The spelling of 97066191 in words is "ninety-seven million, sixty-six thousand, one hundred ninety-one".