442190197 has 2 divisors, whose sum is σ = 442190198. Its totient is φ = 442190196.

The previous prime is 442190171. The next prime is 442190239. The reversal of 442190197 is 791091244.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 390220516 + 51969681 = 19754^2 + 7209^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442190197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442190597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221095098 + 221095099.

It is an arithmetic number, because the mean of its divisors is an integer number (221095099).

Almost surely, 2^442190197 is an apocalyptic number.

It is an amenable number.

442190197 is a deficient number, since it is larger than the sum of its proper divisors (1).

442190197 is an equidigital number, since it uses as much as digits as its factorization.

442190197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 442190197 is about 21028.3189294817. The cubic root of 442190197 is about 761.8504062424.

The spelling of 442190197 in words is "four hundred forty-two million, one hundred ninety thousand, one hundred ninety-seven".