1423085789 has 2 divisors, whose sum is σ = 1423085790. Its totient is φ = 1423085788.

The previous prime is 1423085777. The next prime is 1423085813. The reversal of 1423085789 is 9875803241.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1378636900 + 44448889 = 37130^2 + 6667^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1423085789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1423085089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 711542894 + 711542895.

It is an arithmetic number, because the mean of its divisors is an integer number (711542895).

Almost surely, 2^1423085789 is an apocalyptic number.

It is an amenable number.

1423085789 is a deficient number, since it is larger than the sum of its proper divisors (1).

1423085789 is an equidigital number, since it uses as much as digits as its factorization.

1423085789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 483840, while the sum is 47.

The square root of 1423085789 is about 37723.8093118921. The cubic root of 1423085789 is about 1124.8044536502.

The spelling of 1423085789 in words is "one billion, four hundred twenty-three million, eighty-five thousand, seven hundred eighty-nine".