84738213491 has 2 divisors, whose sum is σ = 84738213492. Its totient is φ = 84738213490.

The previous prime is 84738213479. The next prime is 84738213523. The reversal of 84738213491 is 19431283748.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84738213491 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (84738218491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42369106745 + 42369106746.

It is an arithmetic number, because the mean of its divisors is an integer number (42369106746).

Almost surely, 2^84738213491 is an apocalyptic number.

84738213491 is a deficient number, since it is larger than the sum of its proper divisors (1).

84738213491 is an equidigital number, since it uses as much as digits as its factorization.

84738213491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1161216, while the sum is 50.

The spelling of 84738213491 in words is "eighty-four billion, seven hundred thirty-eight million, two hundred thirteen thousand, four hundred ninety-one".