97161091 has 4 divisors (see below), whose sum is σ = 98123184. Its totient is φ = 96199000.

The previous prime is 97161067. The next prime is 97161109. The reversal of 97161091 is 19016179.

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 97161091 - 2⁵ = 97161059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97161011) 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, 480895 + ... + 481096.

It is an arithmetic number, because the mean of its divisors is an integer number (24530796).

Almost surely, 2^97161091 is an apocalyptic number.

97161091 is a deficient number, since it is larger than the sum of its proper divisors (962093).

97161091 is a wasteful number, since it uses less digits than its factorization.

97161091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 962092.

The product of its (nonzero) digits is 3402, while the sum is 34.

The square root of 97161091 is about 9857.0325656356. The cubic root of 97161091 is about 459.7243007673.

The spelling of 97161091 in words is "ninety-seven million, one hundred sixty-one thousand, ninety-one".