1469639891 has 2 divisors, whose sum is σ = 1469639892. Its totient is φ = 1469639890.

The previous prime is 1469639887. The next prime is 1469639893. The reversal of 1469639891 is 1989369641.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1469639891 - 2² = 1469639887 is a prime.

Together with 1469639893, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1469639893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 734819945 + 734819946.

It is an arithmetic number, because the mean of its divisors is an integer number (734819946).

Almost surely, 2^1469639891 is an apocalyptic number.

1469639891 is a deficient number, since it is larger than the sum of its proper divisors (1).

1469639891 is an equidigital number, since it uses as much as digits as its factorization.

1469639891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2519424, while the sum is 56.

The square root of 1469639891 is about 38335.8825514687. The cubic root of 1469639891 is about 1136.9385105675.

The spelling of 1469639891 in words is "one billion, four hundred sixty-nine million, six hundred thirty-nine thousand, eight hundred ninety-one".