97143439 has 2 divisors, whose sum is σ = 97143440. Its totient is φ = 97143438.

The previous prime is 97143437. The next prime is 97143469. The reversal of 97143439 is 93434179.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 97143439 - 2¹ = 97143437 is a prime.

Together with 97143437, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97143437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48571719 + 48571720.

It is an arithmetic number, because the mean of its divisors is an integer number (48571720).

Almost surely, 2^97143439 is an apocalyptic number.

97143439 is a deficient number, since it is larger than the sum of its proper divisors (1).

97143439 is an equidigital number, since it uses as much as digits as its factorization.

97143439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 40.

The square root of 97143439 is about 9856.1371236403. The cubic root of 97143439 is about 459.6964585355.

The spelling of 97143439 in words is "ninety-seven million, one hundred forty-three thousand, four hundred thirty-nine".