764213 has 4 divisors (see below), whose sum is σ = 766080. Its totient is φ = 762348.

The previous prime is 764209. The next prime is 764233. The reversal of 764213 is 312467.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 312467 = 193 ⋅1619.

It is a cyclic number.

It is not a de Polignac number, because 764213 - 2² = 764209 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (764233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23 + ... + 1236.

It is an arithmetic number, because the mean of its divisors is an integer number (191520).

2⁷⁶⁴²¹³ is an apocalyptic number.

It is an amenable number.

764213 is a deficient number, since it is larger than the sum of its proper divisors (1867).

764213 is a wasteful number, since it uses less digits than its factorization.

764213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1866.

The product of its digits is 1008, while the sum is 23.

The square root of 764213 is about 874.1927705032. The cubic root of 764213 is about 91.4263693434.

The spelling of 764213 in words is "seven hundred sixty-four thousand, two hundred thirteen".