97879505839 has 2 divisors, whose sum is σ = 97879505840. Its totient is φ = 97879505838.

The previous prime is 97879505807. The next prime is 97879505923. The reversal of 97879505839 is 93850597879.

It is a weak prime.

It is an emirp because it is prime and its reverse (93850597879) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97879505839 - 2⁵ = 97879505807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97879505239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48939752919 + 48939752920.

It is an arithmetic number, because the mean of its divisors is an integer number (48939752920).

Almost surely, 2^97879505839 is an apocalyptic number.

97879505839 is a deficient number, since it is larger than the sum of its proper divisors (1).

97879505839 is an equidigital number, since it uses as much as digits as its factorization.

97879505839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 171460800, while the sum is 70.

The spelling of 97879505839 in words is "ninety-seven billion, eight hundred seventy-nine million, five hundred five thousand, eight hundred thirty-nine".