763873645 has 4 divisors (see below), whose sum is σ = 916648380. Its totient is φ = 611098912.

The previous prime is 763873637. The next prime is 763873667. The reversal of 763873645 is 546378367.

It is a happy number.

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 152102889 + 611770756 = 12333^2 + 24734^2 .

It is a cyclic number.

It is not a de Polignac number, because 763873645 - 2³ = 763873637 is a prime.

It is a super-3 number, since 3×763873645³ (a number of 28 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76387360 + ... + 76387369.

It is an arithmetic number, because the mean of its divisors is an integer number (229162095).

Almost surely, 2^763873645 is an apocalyptic number.

It is an amenable number.

763873645 is a deficient number, since it is larger than the sum of its proper divisors (152774735).

763873645 is a wasteful number, since it uses less digits than its factorization.

763873645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152774734.

The product of its digits is 2540160, while the sum is 49.

The square root of 763873645 is about 27638.2641459264. The cubic root of 763873645 is about 914.1283446536.

The spelling of 763873645 in words is "seven hundred sixty-three million, eight hundred seventy-three thousand, six hundred forty-five".