97940189 has 4 divisors (see below), whose sum is σ = 98207424. Its totient is φ = 97672956.

The previous prime is 97940153. The next prime is 97940207. The reversal of 97940189 is 98104979.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 98104979 = 7 ⋅14014997.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97940189 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97940119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133067 + ... + 133800.

It is an arithmetic number, because the mean of its divisors is an integer number (24551856).

Almost surely, 2^97940189 is an apocalyptic number.

It is an amenable number.

97940189 is a deficient number, since it is larger than the sum of its proper divisors (267235).

97940189 is a wasteful number, since it uses less digits than its factorization.

97940189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267234.

The product of its (nonzero) digits is 163296, while the sum is 47.

The square root of 97940189 is about 9896.4735638509. The cubic root of 97940189 is about 460.9498159666.

The spelling of 97940189 in words is "ninety-seven million, nine hundred forty thousand, one hundred eighty-nine".