442130197 has 2 divisors, whose sum is σ = 442130198. Its totient is φ = 442130196.

The previous prime is 442130189. The next prime is 442130239. The reversal of 442130197 is 791031244.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 427083556 + 15046641 = 20666^2 + 3879^2 .

It is a cyclic number.

It is not a de Polignac number, because 442130197 - 2³ = 442130189 is a prime.

It is a super-2 number, since 2×442130197² = 390958222198517618, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442130107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221065098 + 221065099.

It is an arithmetic number, because the mean of its divisors is an integer number (221065099).

Almost surely, 2^442130197 is an apocalyptic number.

It is an amenable number.

442130197 is a deficient number, since it is larger than the sum of its proper divisors (1).

442130197 is an equidigital number, since it uses as much as digits as its factorization.

442130197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 442130197 is about 21026.8922335185. The cubic root of 442130197 is about 761.8159466423.

The spelling of 442130197 in words is "four hundred forty-two million, one hundred thirty thousand, one hundred ninety-seven".