1421903117 has 2 divisors, whose sum is σ = 1421903118. Its totient is φ = 1421903116.

The previous prime is 1421903113. The next prime is 1421903123. The reversal of 1421903117 is 7113091241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 785905156 + 635997961 = 28034^2 + 25219^2 .

It is a cyclic number.

It is not a de Polignac number, because 1421903117 - 2² = 1421903113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1421903117.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1421903113) 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, 710951558 + 710951559.

It is an arithmetic number, because the mean of its divisors is an integer number (710951559).

Almost surely, 2^1421903117 is an apocalyptic number.

It is an amenable number.

1421903117 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421903117 is an equidigital number, since it uses as much as digits as its factorization.

1421903117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 29.

The square root of 1421903117 is about 37708.1306484424. The cubic root of 1421903117 is about 1124.4927733503.

Adding to 1421903117 its reverse (7113091241), we get a palindrome (8534994358).

The spelling of 1421903117 in words is "one billion, four hundred twenty-one million, nine hundred three thousand, one hundred seventeen".