764321693 has 2 divisors, whose sum is σ = 764321694. Its totient is φ = 764321692.

The previous prime is 764321659. The next prime is 764321737. The reversal of 764321693 is 396123467.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 711715684 + 52606009 = 26678^2 + 7253^2 .

It is an emirp because it is prime and its reverse (396123467) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 764321693 - 2¹⁴ = 764305309 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 764321693.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (764327693) 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 as a sum of consecutive naturals, namely, 382160846 + 382160847.

It is an arithmetic number, because the mean of its divisors is an integer number (382160847).

Almost surely, 2^764321693 is an apocalyptic number.

It is an amenable number.

764321693 is a deficient number, since it is larger than the sum of its proper divisors (1).

764321693 is an equidigital number, since it uses as much as digits as its factorization.

764321693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 41.

The square root of 764321693 is about 27646.3685318705. The cubic root of 764321693 is about 914.3070362157.

It can be divided in two parts, 76432 and 1693, that added together give a 7-th power (78125 = 5⁷).

The spelling of 764321693 in words is "seven hundred sixty-four million, three hundred twenty-one thousand, six hundred ninety-three".