1421934887 has 2 divisors, whose sum is σ = 1421934888. Its totient is φ = 1421934886.

The previous prime is 1421934823. The next prime is 1421934889. The reversal of 1421934887 is 7884391241.

It is a strong prime.

It is an emirp because it is prime and its reverse (7884391241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1421934887 - 2⁶ = 1421934823 is a prime.

Together with 1421934889, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1421934889) 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, 710967443 + 710967444.

It is an arithmetic number, because the mean of its divisors is an integer number (710967444).

Almost surely, 2^1421934887 is an apocalyptic number.

1421934887 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421934887 is an equidigital number, since it uses as much as digits as its factorization.

1421934887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 387072, while the sum is 47.

The square root of 1421934887 is about 37708.5519080221. The cubic root of 1421934887 is about 1124.5011482456.

The spelling of 1421934887 in words is "one billion, four hundred twenty-one million, nine hundred thirty-four thousand, eight hundred eighty-seven".