976643 has 2 divisors, whose sum is σ = 976644. Its totient is φ = 976642.

The previous prime is 976639. The next prime is 976669. The reversal of 976643 is 346679.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 976643 - 2² = 976639 is a prime.

It is a Chen prime.

It is a nialpdrome in base 10.

It is not a weakly prime, because it can be changed into another prime (970643) 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 as a sum of consecutive naturals, namely, 488321 + 488322.

It is an arithmetic number, because the mean of its divisors is an integer number (488322).

2⁹⁷⁶⁶⁴³ is an apocalyptic number.

976643 is a deficient number, since it is larger than the sum of its proper divisors (1).

976643 is an equidigital number, since it uses as much as digits as its factorization.

976643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 35.

The square root of 976643 is about 988.2524980995. The cubic root of 976643 is about 99.2152917698.

The spelling of 976643 in words is "nine hundred seventy-six thousand, six hundred forty-three".