1422781887 has 4 divisors (see below), whose sum is σ = 1897042520. Its totient is φ = 948521256.

The previous prime is 1422781861. The next prime is 1422781891. The reversal of 1422781887 is 7881872241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7881872241 = 3 ⋅2627290747.

It is not a de Polignac number, because 1422781887 - 2⁶ = 1422781823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1422785887) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 237130312 + ... + 237130317.

It is an arithmetic number, because the mean of its divisors is an integer number (474260630).

Almost surely, 2^1422781887 is an apocalyptic number.

1422781887 is a deficient number, since it is larger than the sum of its proper divisors (474260633).

1422781887 is an equidigital number, since it uses as much as digits as its factorization.

1422781887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474260632.

The product of its digits is 401408, while the sum is 48.

The square root of 1422781887 is about 37719.7811101814. The cubic root of 1422781887 is about 1124.7243800848.

The spelling of 1422781887 in words is "one billion, four hundred twenty-two million, seven hundred eighty-one thousand, eight hundred eighty-seven".