1423989911 has 4 divisors (see below), whose sum is σ = 1425293832. Its totient is φ = 1422685992.

The previous prime is 1423989907. The next prime is 1423989937. The reversal of 1423989911 is 1199893241.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1423989911 - 2² = 1423989907 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 (1423989971) 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, 650321 + ... + 652506.

It is an arithmetic number, because the mean of its divisors is an integer number (356323458).

Almost surely, 2^1423989911 is an apocalyptic number.

1423989911 is a deficient number, since it is larger than the sum of its proper divisors (1303921).

1423989911 is a wasteful number, since it uses less digits than its factorization.

1423989911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1303920.

The product of its digits is 139968, while the sum is 47.

The square root of 1423989911 is about 37735.7908490070. The cubic root of 1423989911 is about 1125.0426086907.

The spelling of 1423989911 in words is "one billion, four hundred twenty-three million, nine hundred eighty-nine thousand, nine hundred eleven".