1420017887 has 2 divisors, whose sum is σ = 1420017888. Its totient is φ = 1420017886.

The previous prime is 1420017869. The next prime is 1420017889. The reversal of 1420017887 is 7887100241.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1420017887 is a prime.

Together with 1420017889, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1420017887.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1420017889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710008943 + 710008944.

It is an arithmetic number, because the mean of its divisors is an integer number (710008944).

Almost surely, 2^1420017887 is an apocalyptic number.

1420017887 is a deficient number, since it is larger than the sum of its proper divisors (1).

1420017887 is an equidigital number, since it uses as much as digits as its factorization.

1420017887 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25088, while the sum is 38.

The square root of 1420017887 is about 37683.1246979334. The cubic root of 1420017887 is about 1123.9955840368.

The spelling of 1420017887 in words is "one billion, four hundred twenty million, seventeen thousand, eight hundred eighty-seven".