89879309693 has 2 divisors, whose sum is σ = 89879309694. Its totient is φ = 89879309692.

The previous prime is 89879309659. The next prime is 89879309711. The reversal of 89879309693 is 39690397898.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89734396249 + 144913444 = 299557^2 + 12038^2 .

It is a cyclic number.

It is not a de Polignac number, because 89879309693 - 2²⁸ = 89610874237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89879309393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44939654846 + 44939654847.

It is an arithmetic number, because the mean of its divisors is an integer number (44939654847).

Almost surely, 2^89879309693 is an apocalyptic number.

It is an amenable number.

89879309693 is a deficient number, since it is larger than the sum of its proper divisors (1).

89879309693 is an equidigital number, since it uses as much as digits as its factorization.

89879309693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 158723712, while the sum is 71.

The spelling of 89879309693 in words is "eighty-nine billion, eight hundred seventy-nine million, three hundred nine thousand, six hundred ninety-three".