761643 has 10 divisors (see below), whose sum is σ = 1137884. Its totient is φ = 507708.

The previous prime is 761633. The next prime is 761669. The reversal of 761643 is 346167.

761643 is a `hidden beast` number, since 7 + 616 + 43 = 666.

It is not a de Polignac number, because 761643 - 2⁵ = 761611 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

761643 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (761603) 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 9 ways as a sum of consecutive naturals, for example, 4621 + ... + 4782.

2⁷⁶¹⁶⁴³ is an apocalyptic number.

761643 is a deficient number, since it is larger than the sum of its proper divisors (376241).

761643 is an equidigital number, since it uses as much as digits as its factorization.

761643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9415 (or 9406 counting only the distinct ones).

The product of its digits is 3024, while the sum is 27.

The square root of 761643 is about 872.7216050952. The cubic root of 761643 is about 91.3237672093.

It can be divided in two parts, 76164 and 3, that added together give a palindrome (76167).

The spelling of 761643 in words is "seven hundred sixty-one thousand, six hundred forty-three".