442163747693 has 2 divisors, whose sum is σ = 442163747694. Its totient is φ = 442163747692.

The previous prime is 442163747659. The next prime is 442163747699. The reversal of 442163747693 is 396747361244.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 370518124804 + 71645622889 = 608702^2 + 267667^2 .

It is a cyclic number.

It is not a de Polignac number, because 442163747693 - 2²² = 442159553389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442163747699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221081873846 + 221081873847.

It is an arithmetic number, because the mean of its divisors is an integer number (221081873847).

Almost surely, 2^442163747693 is an apocalyptic number.

It is an amenable number.

442163747693 is a deficient number, since it is larger than the sum of its proper divisors (1).

442163747693 is an equidigital number, since it uses as much as digits as its factorization.

442163747693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18289152, while the sum is 56.

The spelling of 442163747693 in words is "four hundred forty-two billion, one hundred sixty-three million, seven hundred forty-seven thousand, six hundred ninety-three".