80449949 has 2 divisors, whose sum is σ = 80449950. Its totient is φ = 80449948.

The previous prime is 80449909. The next prime is 80449969. The reversal of 80449949 is 94994408.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56145049 + 24304900 = 7493^2 + 4930^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80449949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80449909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40224974 + 40224975.

It is an arithmetic number, because the mean of its divisors is an integer number (40224975).

Almost surely, 2^80449949 is an apocalyptic number.

It is an amenable number.

80449949 is a deficient number, since it is larger than the sum of its proper divisors (1).

80449949 is an equidigital number, since it uses as much as digits as its factorization.

80449949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 373248, while the sum is 47.

The square root of 80449949 is about 8969.3895555941. The cubic root of 80449949 is about 431.6932496727.

The spelling of 80449949 in words is "eighty million, four hundred forty-nine thousand, nine hundred forty-nine".