97147439 has 2 divisors, whose sum is σ = 97147440. Its totient is φ = 97147438.

The previous prime is 97147429. The next prime is 97147481. The reversal of 97147439 is 93474179.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97147439 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 97147439.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97147429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48573719 + 48573720.

It is an arithmetic number, because the mean of its divisors is an integer number (48573720).

Almost surely, 2^97147439 is an apocalyptic number.

97147439 is a deficient number, since it is larger than the sum of its proper divisors (1).

97147439 is an equidigital number, since it uses as much as digits as its factorization.

97147439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 190512, while the sum is 44.

The square root of 97147439 is about 9856.3400408062. The cubic root of 97147439 is about 459.7027679703.

The spelling of 97147439 in words is "ninety-seven million, one hundred forty-seven thousand, four hundred thirty-nine".