86928780619 has 2 divisors, whose sum is σ = 86928780620. Its totient is φ = 86928780618.

The previous prime is 86928780599. The next prime is 86928780647. The reversal of 86928780619 is 91608782968.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86928780619 is a prime.

It is a super-2 number, since 2×86928780619² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (86928780649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43464390309 + 43464390310.

It is an arithmetic number, because the mean of its divisors is an integer number (43464390310).

Almost surely, 2^86928780619 is an apocalyptic number.

86928780619 is a deficient number, since it is larger than the sum of its proper divisors (1).

86928780619 is an equidigital number, since it uses as much as digits as its factorization.

86928780619 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20901888, while the sum is 64.

The spelling of 86928780619 in words is "eighty-six billion, nine hundred twenty-eight million, seven hundred eighty thousand, six hundred nineteen".