97908139843 has 4 divisors (see below), whose sum is σ = 97908818560. Its totient is φ = 97907461128.

The previous prime is 97908139801. The next prime is 97908139877. The reversal of 97908139843 is 34893180979.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 97908139843 - 2⁹ = 97908139331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97908139643) 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, 27363 + ... + 443356.

It is an arithmetic number, because the mean of its divisors is an integer number (24477204640).

Almost surely, 2^97908139843 is an apocalyptic number.

97908139843 is a deficient number, since it is larger than the sum of its proper divisors (678717).

97908139843 is a wasteful number, since it uses less digits than its factorization.

97908139843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678716.

The product of its (nonzero) digits is 11757312, while the sum is 61.

The spelling of 97908139843 in words is "ninety-seven billion, nine hundred eight million, one hundred thirty-nine thousand, eight hundred forty-three".