1423565489 has 4 divisors (see below), whose sum is σ = 1426963440. Its totient is φ = 1420167540.

The previous prime is 1423565471. The next prime is 1423565509. The reversal of 1423565489 is 9845653241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9845653241 = 17 ⋅579156073.

It is a cyclic number.

It is not a de Polignac number, because 1423565489 - 2²⁸ = 1155130033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1423565419) 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, 1698347 + ... + 1699184.

It is an arithmetic number, because the mean of its divisors is an integer number (356740860).

Almost surely, 2^1423565489 is an apocalyptic number.

It is an amenable number.

1423565489 is a deficient number, since it is larger than the sum of its proper divisors (3397951).

1423565489 is an equidigital number, since it uses as much as digits as its factorization.

1423565489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3397950.

The product of its digits is 1036800, while the sum is 47.

The square root of 1423565489 is about 37730.1668297398. The cubic root of 1423565489 is about 1124.9308241251.

The spelling of 1423565489 in words is "one billion, four hundred twenty-three million, five hundred sixty-five thousand, four hundred eighty-nine".