1422787643 has 2 divisors, whose sum is σ = 1422787644. Its totient is φ = 1422787642.

The previous prime is 1422787631. The next prime is 1422787661. The reversal of 1422787643 is 3467872241.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1422787643 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 1422787594 and 1422787603.

It is not a weakly prime, because it can be changed into another prime (1422787343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 711393821 + 711393822.

It is an arithmetic number, because the mean of its divisors is an integer number (711393822).

Almost surely, 2^1422787643 is an apocalyptic number.

1422787643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1422787643 is an equidigital number, since it uses as much as digits as its factorization.

1422787643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 451584, while the sum is 44.

The square root of 1422787643 is about 37719.8574095926. The cubic root of 1422787643 is about 1124.7258968094.

The spelling of 1422787643 in words is "one billion, four hundred twenty-two million, seven hundred eighty-seven thousand, six hundred forty-three".