4445491 has 2 divisors, whose sum is σ = 4445492. Its totient is φ = 4445490.

The previous prime is 4445479. The next prime is 4445501. The reversal of 4445491 is 1945444.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4445491 - 2⁵ = 4445459 is a prime.

4445491 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (4449491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2222745 + 2222746.

It is an arithmetic number, because the mean of its divisors is an integer number (2222746).

Almost surely, 2^4445491 is an apocalyptic number.

4445491 is a deficient number, since it is larger than the sum of its proper divisors (1).

4445491 is an equidigital number, since it uses as much as digits as its factorization.

4445491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11520, while the sum is 31.

The square root of 4445491 is about 2108.4333046127. The cubic root of 4445491 is about 164.4270424156.

The spelling of 4445491 in words is "four million, four hundred forty-five thousand, four hundred ninety-one".