764653 has 4 divisors (see below), whose sum is σ = 767260. Its totient is φ = 762048.

The previous prime is 764629. The next prime is 764657. The reversal of 764653 is 356467.

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

It can be written as a sum of positive squares in 2 ways, for example, as 103684 + 660969 = 322^2 + 813^2 .

It is a 5-Lehmer number, since φ(764653) divides (764653-1)⁵.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-764653 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (764657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 798 + ... + 1471.

It is an arithmetic number, because the mean of its divisors is an integer number (191815).

2⁷⁶⁴⁶⁵³ is an apocalyptic number.

It is an amenable number.

764653 is a deficient number, since it is larger than the sum of its proper divisors (2607).

764653 is a wasteful number, since it uses less digits than its factorization.

764653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2606.

The product of its digits is 15120, while the sum is 31.

The square root of 764653 is about 874.4443950304. Note that the first 3 decimals coincide. The cubic root of 764653 is about 91.4439123951.

The spelling of 764653 in words is "seven hundred sixty-four thousand, six hundred fifty-three".