442323403 has 2 divisors, whose sum is σ = 442323404. Its totient is φ = 442323402.

The previous prime is 442323389. The next prime is 442323463. The reversal of 442323403 is 304323244.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442323403 is a prime.

It is not a weakly prime, because it can be changed into another prime (442323463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221161701 + 221161702.

It is an arithmetic number, because the mean of its divisors is an integer number (221161702).

Almost surely, 2^442323403 is an apocalyptic number.

442323403 is a deficient number, since it is larger than the sum of its proper divisors (1).

442323403 is an equidigital number, since it uses as much as digits as its factorization.

442323403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 25.

The square root of 442323403 is about 21031.4859912466. The cubic root of 442323403 is about 761.9268988597.

Adding to 442323403 its reverse (304323244), we get a palindrome (746646647).

The spelling of 442323403 in words is "four hundred forty-two million, three hundred twenty-three thousand, four hundred three".