80920949 has 2 divisors, whose sum is σ = 80920950. Its totient is φ = 80920948.

The previous prime is 80920891. The next prime is 80920951. The reversal of 80920949 is 94902908.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61622500 + 19298449 = 7850^2 + 4393^2 .

It is a cyclic number.

It is not a de Polignac number, because 80920949 - 2¹⁶ = 80855413 is a prime.

It is a Sophie Germain prime.

Together with 80920951, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80920249) 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 as a sum of consecutive naturals, namely, 40460474 + 40460475.

It is an arithmetic number, because the mean of its divisors is an integer number (40460475).

Almost surely, 2^80920949 is an apocalyptic number.

It is an amenable number.

80920949 is a deficient number, since it is larger than the sum of its proper divisors (1).

80920949 is an equidigital number, since it uses as much as digits as its factorization.

80920949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 80920949 is about 8995.6072057421. The cubic root of 80920949 is about 432.5340706228.

The spelling of 80920949 in words is "eighty million, nine hundred twenty thousand, nine hundred forty-nine".