97211091 has 8 divisors (see below), whose sum is σ = 130873600. Its totient is φ = 64177992.

The previous prime is 97211057. The next prime is 97211113. The reversal of 97211091 is 19011279.

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

It is not a de Polignac number, because 97211091 - 2⁷ = 97210963 is a prime.

It is a super-3 number, since 3×97211091³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97212091) 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, 156991 + ... + 157608.

It is an arithmetic number, because the mean of its divisors is an integer number (16359200).

Almost surely, 2^97211091 is an apocalyptic number.

97211091 is a deficient number, since it is larger than the sum of its proper divisors (33662509).

97211091 is a wasteful number, since it uses less digits than its factorization.

97211091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314705.

The product of its (nonzero) digits is 1134, while the sum is 30.

The square root of 97211091 is about 9859.5684996860. The cubic root of 97211091 is about 459.8031467091.

The spelling of 97211091 in words is "ninety-seven million, two hundred eleven thousand, ninety-one".