120813691 has 2 divisors, whose sum is σ = 120813692. Its totient is φ = 120813690.

The previous prime is 120813689. The next prime is 120813701. The reversal of 120813691 is 196318021.

It is a weak prime.

It is an emirp because it is prime and its reverse (196318021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 120813691 - 2¹ = 120813689 is a prime.

Together with 120813689, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (120813601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60406845 + 60406846.

It is an arithmetic number, because the mean of its divisors is an integer number (60406846).

Almost surely, 2^120813691 is an apocalyptic number.

120813691 is a deficient number, since it is larger than the sum of its proper divisors (1).

120813691 is an equidigital number, since it uses as much as digits as its factorization.

120813691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 120813691 is about 10991.5281467137. The cubic root of 120813691 is about 494.3547570057.

The spelling of 120813691 in words is "one hundred twenty million, eight hundred thirteen thousand, six hundred ninety-one".