97209143 has 4 divisors (see below), whose sum is σ = 98101080. Its totient is φ = 96317208.

The previous prime is 97209139. The next prime is 97209163. The reversal of 97209143 is 34190279.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34190279 = 3539 ⋅9661.

It is a cyclic number.

It is not a de Polignac number, because 97209143 - 2² = 97209139 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97209163) 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, 445805 + ... + 446022.

It is an arithmetic number, because the mean of its divisors is an integer number (24525270).

Almost surely, 2^97209143 is an apocalyptic number.

97209143 is a deficient number, since it is larger than the sum of its proper divisors (891937).

97209143 is a wasteful number, since it uses less digits than its factorization.

97209143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 891936.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 97209143 is about 9859.4697119064. The cubic root of 97209143 is about 459.8000753774.

The spelling of 97209143 in words is "ninety-seven million, two hundred nine thousand, one hundred forty-three".