449620991 has 2 divisors, whose sum is σ = 449620992. Its totient is φ = 449620990.

The previous prime is 449620979. The next prime is 449620999. The reversal of 449620991 is 199026944.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 449620991 - 2¹⁴ = 449604607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (449620999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 224810495 + 224810496.

It is an arithmetic number, because the mean of its divisors is an integer number (224810496).

Almost surely, 2^449620991 is an apocalyptic number.

449620991 is a deficient number, since it is larger than the sum of its proper divisors (1).

449620991 is an equidigital number, since it uses as much as digits as its factorization.

449620991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 449620991 is about 21204.2682259964. The cubic root of 449620991 is about 766.0942325790.

The spelling of 449620991 in words is "four hundred forty-nine million, six hundred twenty thousand, nine hundred ninety-one".