1423613665 has 16 divisors (see below), whose sum is σ = 1846854720. Its totient is φ = 1049785920.

The previous prime is 1423613657. The next prime is 1423613699. The reversal of 1423613665 is 5663163241.

It is not a de Polignac number, because 1423613665 - 2³ = 1423613657 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198991 + ... + 206020.

It is an arithmetic number, because the mean of its divisors is an integer number (115428420).

Almost surely, 2^1423613665 is an apocalyptic number.

It is an amenable number.

1423613665 is a deficient number, since it is larger than the sum of its proper divisors (423241055).

1423613665 is a wasteful number, since it uses less digits than its factorization.

1423613665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405072.

The product of its digits is 77760, while the sum is 37.

The square root of 1423613665 is about 37730.8052524724. The cubic root of 1423613665 is about 1124.9435138717.

The spelling of 1423613665 in words is "one billion, four hundred twenty-three million, six hundred thirteen thousand, six hundred sixty-five".