422739997 has 2 divisors, whose sum is σ = 422739998. Its totient is φ = 422739996.

The previous prime is 422739983. The next prime is 422740039. The reversal of 422739997 is 799937224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 372528601 + 50211396 = 19301^2 + 7086^2 .

It is a cyclic number.

It is not a de Polignac number, because 422739997 - 2⁷ = 422739869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (422739907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211369998 + 211369999.

It is an arithmetic number, because the mean of its divisors is an integer number (211369999).

Almost surely, 2^422739997 is an apocalyptic number.

It is an amenable number.

422739997 is a deficient number, since it is larger than the sum of its proper divisors (1).

422739997 is an equidigital number, since it uses as much as digits as its factorization.

422739997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1714608, while the sum is 52.

The square root of 422739997 is about 20560.6419403675. The cubic root of 422739997 is about 750.5122408809.

The spelling of 422739997 in words is "four hundred twenty-two million, seven hundred thirty-nine thousand, nine hundred ninety-seven".