197089091 has 8 divisors (see below), whose sum is σ = 202950384. Its totient is φ = 191278080.

The previous prime is 197089069. The next prime is 197089111. The reversal of 197089091 is 190980791.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 197089091 - 2²² = 192894787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197089021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4541 + ... + 20366.

It is an arithmetic number, because the mean of its divisors is an integer number (25368798).

Almost surely, 2^197089091 is an apocalyptic number.

197089091 is a deficient number, since it is larger than the sum of its proper divisors (5861293).

197089091 is a wasteful number, since it uses less digits than its factorization.

197089091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25141.

The product of its (nonzero) digits is 40824, while the sum is 44.

The square root of 197089091 is about 14038.8422243431. The cubic root of 197089091 is about 581.9524874319.

The spelling of 197089091 in words is "one hundred ninety-seven million, eighty-nine thousand, ninety-one".