691354801 has 2 divisors, whose sum is σ = 691354802. Its totient is φ = 691354800.

The previous prime is 691354799. The next prime is 691354823. The reversal of 691354801 is 108453196.

691354801 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 674960400 + 16394401 = 25980^2 + 4049^2 .

It is a cyclic number.

It is not a de Polignac number, because 691354801 - 2¹ = 691354799 is a prime.

Together with 691354799, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (691354831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345677400 + 345677401.

It is an arithmetic number, because the mean of its divisors is an integer number (345677401).

Almost surely, 2^691354801 is an apocalyptic number.

It is an amenable number.

691354801 is a deficient number, since it is larger than the sum of its proper divisors (1).

691354801 is an equidigital number, since it uses as much as digits as its factorization.

691354801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 691354801 is about 26293.6266231952. The cubic root of 691354801 is about 884.2335607375.

The spelling of 691354801 in words is "six hundred ninety-one million, three hundred fifty-four thousand, eight hundred one".