84670375991 has 2 divisors, whose sum is σ = 84670375992. Its totient is φ = 84670375990.

The previous prime is 84670375949. The next prime is 84670376003. The reversal of 84670375991 is 19957307648.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84670375991 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 84670375991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84670375901) 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, 42335187995 + 42335187996.

It is an arithmetic number, because the mean of its divisors is an integer number (42335187996).

Almost surely, 2^84670375991 is an apocalyptic number.

84670375991 is a deficient number, since it is larger than the sum of its proper divisors (1).

84670375991 is an equidigital number, since it uses as much as digits as its factorization.

84670375991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11430720, while the sum is 59.

The spelling of 84670375991 in words is "eighty-four billion, six hundred seventy million, three hundred seventy-five thousand, nine hundred ninety-one".