689095591091 has 2 divisors, whose sum is σ = 689095591092. Its totient is φ = 689095591090.

The previous prime is 689095591069. The next prime is 689095591097. The reversal of 689095591091 is 190195590986.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 689095591091 - 2¹⁴ = 689095574707 is a prime.

It is a super-2 number, since 2×689095591091² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (689095591097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344547795545 + 344547795546.

It is an arithmetic number, because the mean of its divisors is an integer number (344547795546).

Almost surely, 2^689095591091 is an apocalyptic number.

689095591091 is a deficient number, since it is larger than the sum of its proper divisors (1).

689095591091 is an equidigital number, since it uses as much as digits as its factorization.

689095591091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7873200, while the sum is 62.

The spelling of 689095591091 in words is "six hundred eighty-nine billion, ninety-five million, five hundred ninety-one thousand, ninety-one".