690064805327 has 4 divisors (see below), whose sum is σ = 690387720336. Its totient is φ = 689741890320.

The previous prime is 690064805203. The next prime is 690064805363. The reversal of 690064805327 is 723508460096.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-690064805327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690064804327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161454299 + ... + 161458572.

It is an arithmetic number, because the mean of its divisors is an integer number (172596930084).

Almost surely, 2^690064805327 is an apocalyptic number.

690064805327 is a deficient number, since it is larger than the sum of its proper divisors (322915009).

690064805327 is a wasteful number, since it uses less digits than its factorization.

690064805327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322915008.

The product of its (nonzero) digits is 2177280, while the sum is 50.

The spelling of 690064805327 in words is "six hundred ninety billion, sixty-four million, eight hundred five thousand, three hundred twenty-seven".