97821190 has 16 divisors (see below), whose sum is σ = 177161328. Its totient is φ = 38887776.

The previous prime is 97821181. The next prime is 97821193. The reversal of 97821190 is 9112879.

It is a super-2 number, since 2×97821190² = 19137970426032200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97821193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28377 + ... + 31636.

It is an arithmetic number, because the mean of its divisors is an integer number (11072583).

Almost surely, 2^97821190 is an apocalyptic number.

97821190 is a deficient number, since it is larger than the sum of its proper divisors (79340138).

97821190 is a wasteful number, since it uses less digits than its factorization.

97821190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60183.

The product of its (nonzero) digits is 9072, while the sum is 37.

The square root of 97821190 is about 9890.4595444297. The cubic root of 97821190 is about 460.7630530102.

The spelling of 97821190 in words is "ninety-seven million, eight hundred twenty-one thousand, one hundred ninety".