763646421 has 16 divisors (see below), whose sum is σ = 1026159680. Its totient is φ = 505128960.

The previous prime is 763646407. The next prime is 763646447. The reversal of 763646421 is 124646367.

It is a happy number.

It is not a de Polignac number, because 763646421 - 2¹¹ = 763644373 is a prime.

It is a super-2 number, since 2×763646421² = 1166311712612218482, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 763646421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (763646321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 282645 + ... + 285333.

It is an arithmetic number, because the mean of its divisors is an integer number (64134980).

Almost surely, 2^763646421 is an apocalyptic number.

It is an amenable number.

763646421 is a deficient number, since it is larger than the sum of its proper divisors (262513259).

763646421 is a wasteful number, since it uses less digits than its factorization.

763646421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3396.

The product of its digits is 145152, while the sum is 39.

The square root of 763646421 is about 27634.1531623460. The cubic root of 763646421 is about 914.0376959365.

The spelling of 763646421 in words is "seven hundred sixty-three million, six hundred forty-six thousand, four hundred twenty-one".