763813 has 4 divisors (see below), whose sum is σ = 765580. Its totient is φ = 762048.

The previous prime is 763811. The next prime is 763823. The reversal of 763813 is 318367.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 318367 = 7 ⋅45481.

It can be written as a sum of positive squares in 2 ways, for example, as 351649 + 412164 = 593^2 + 642^2 .

It is a 3-Lehmer number, since φ(763813) divides (763813-1)³.

It is a cyclic number.

It is not a de Polignac number, because 763813 - 2¹ = 763811 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 (763811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 253 + ... + 1261.

It is an arithmetic number, because the mean of its divisors is an integer number (191395).

2⁷⁶³⁸¹³ is an apocalyptic number.

It is an amenable number.

763813 is a deficient number, since it is larger than the sum of its proper divisors (1767).

763813 is a wasteful number, since it uses less digits than its factorization.

763813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1766.

The product of its digits is 3024, while the sum is 28.

The square root of 763813 is about 873.9639580669. The cubic root of 763813 is about 91.4104152703.

The spelling of 763813 in words is "seven hundred sixty-three thousand, eight hundred thirteen".