100801691 has 2 divisors, whose sum is σ = 100801692. Its totient is φ = 100801690.

The previous prime is 100801681. The next prime is 100801717. The reversal of 100801691 is 196108001.

It is an a-pointer prime, because the next prime (100801717) can be obtained adding 100801691 to its sum of digits (26).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100801691 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 100801691.

It is not a weakly prime, because it can be changed into another prime (100801661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50400845 + 50400846.

It is an arithmetic number, because the mean of its divisors is an integer number (50400846).

Almost surely, 2^100801691 is an apocalyptic number.

100801691 is a deficient number, since it is larger than the sum of its proper divisors (1).

100801691 is an equidigital number, since it uses as much as digits as its factorization.

100801691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 26.

The square root of 100801691 is about 10040.0045318715. The cubic root of 100801691 is about 465.3959567232.

Adding to 100801691 its reverse (196108001), we get a palindrome (296909692).

The spelling of 100801691 in words is "one hundred million, eight hundred one thousand, six hundred ninety-one".