69190091891 has 2 divisors, whose sum is σ = 69190091892. Its totient is φ = 69190091890.

The previous prime is 69190091869. The next prime is 69190091903. The reversal of 69190091891 is 19819009196.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 69190091891 - 2⁶ = 69190091827 is a prime.

It is not a weakly prime, because it can be changed into another prime (69190091491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34595045945 + 34595045946.

It is an arithmetic number, because the mean of its divisors is an integer number (34595045946).

Almost surely, 2^69190091891 is an apocalyptic number.

69190091891 is a deficient number, since it is larger than the sum of its proper divisors (1).

69190091891 is an equidigital number, since it uses as much as digits as its factorization.

69190091891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 314928, while the sum is 53.

The spelling of 69190091891 in words is "sixty-nine billion, one hundred ninety million, ninety-one thousand, eight hundred ninety-one".