422145487 has 2 divisors, whose sum is σ = 422145488. Its totient is φ = 422145486.

The previous prime is 422145443. The next prime is 422145497. The reversal of 422145487 is 784541224.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-422145487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (422145497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211072743 + 211072744.

It is an arithmetic number, because the mean of its divisors is an integer number (211072744).

Almost surely, 2^422145487 is an apocalyptic number.

422145487 is a deficient number, since it is larger than the sum of its proper divisors (1).

422145487 is an equidigital number, since it uses as much as digits as its factorization.

422145487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 71680, while the sum is 37.

The square root of 422145487 is about 20546.1793771981. The cubic root of 422145487 is about 750.1602543482.

The spelling of 422145487 in words is "four hundred twenty-two million, one hundred forty-five thousand, four hundred eighty-seven".