445091 has 2 divisors, whose sum is σ = 445092. Its totient is φ = 445090.

The previous prime is 445087. The next prime is 445097. The reversal of 445091 is 190544.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 445091 - 2² = 445087 is a prime.

It is equal to p₃₇₃₅₅ and since 445091 and 37355 have the same sum of digits, it is a Honaker prime.

It is a plaindrome in base 13.

It is not a weakly prime, because it can be changed into another prime (445097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222545 + 222546.

It is an arithmetic number, because the mean of its divisors is an integer number (222546).

2⁴⁴⁵⁰⁹¹ is an apocalyptic number.

445091 is a deficient number, since it is larger than the sum of its proper divisors (1).

445091 is an equidigital number, since it uses as much as digits as its factorization.

445091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 445091 is about 667.1514071034. The cubic root of 445091 is about 76.3512709742.

The spelling of 445091 in words is "four hundred forty-five thousand, ninety-one".