442860091 has 2 divisors, whose sum is σ = 442860092. Its totient is φ = 442860090.

The previous prime is 442860043. The next prime is 442860107. The reversal of 442860091 is 190068244.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 442860091 - 2⁹ = 442859579 is a prime.

It is a super-2 number, since 2×442860091² = 392250120401056562, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (442860391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221430045 + 221430046.

It is an arithmetic number, because the mean of its divisors is an integer number (221430046).

Almost surely, 2^442860091 is an apocalyptic number.

442860091 is a deficient number, since it is larger than the sum of its proper divisors (1).

442860091 is an equidigital number, since it uses as much as digits as its factorization.

442860091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 442860091 is about 21044.2412787917. The cubic root of 442860091 is about 762.2349327155.

The spelling of 442860091 in words is "four hundred forty-two million, eight hundred sixty thousand, ninety-one".