445496921 has 2 divisors, whose sum is σ = 445496922. Its totient is φ = 445496920.

The previous prime is 445496911. The next prime is 445496941. The reversal of 445496921 is 129694544.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 255360400 + 190136521 = 15980^2 + 13789^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-445496921 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (445496911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222748460 + 222748461.

It is an arithmetic number, because the mean of its divisors is an integer number (222748461).

Almost surely, 2^445496921 is an apocalyptic number.

It is an amenable number.

445496921 is a deficient number, since it is larger than the sum of its proper divisors (1).

445496921 is an equidigital number, since it uses as much as digits as its factorization.

445496921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 311040, while the sum is 44.

The square root of 445496921 is about 21106.7979807454. The cubic root of 445496921 is about 763.7447459421.

It can be divided in two parts, 4454 and 96921, that multiplied together give a palindrome (431686134).

The spelling of 445496921 in words is "four hundred forty-five million, four hundred ninety-six thousand, nine hundred twenty-one".