820980623 has 2 divisors, whose sum is σ = 820980624. Its totient is φ = 820980622.

The previous prime is 820980619. The next prime is 820980637. The reversal of 820980623 is 326089028.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 820980623 - 2² = 820980619 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (820980673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410490311 + 410490312.

It is an arithmetic number, because the mean of its divisors is an integer number (410490312).

Almost surely, 2^820980623 is an apocalyptic number.

820980623 is a deficient number, since it is larger than the sum of its proper divisors (1).

820980623 is an equidigital number, since it uses as much as digits as its factorization.

820980623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 820980623 is about 28652.7594308122. The cubic root of 820980623 is about 936.3631248517.

The spelling of 820980623 in words is "eight hundred twenty million, nine hundred eighty thousand, six hundred twenty-three".