1423625809 has 8 divisors (see below), whose sum is σ = 1448601120. Its totient is φ = 1398678816.

The previous prime is 1423625771. The next prime is 1423625813. The reversal of 1423625809 is 9085263241.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1423625809 - 2²⁵ = 1390071377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1423625009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111534 + ... + 123640.

It is an arithmetic number, because the mean of its divisors is an integer number (181075140).

Almost surely, 2^1423625809 is an apocalyptic number.

It is an amenable number.

1423625809 is a deficient number, since it is larger than the sum of its proper divisors (24975311).

1423625809 is a wasteful number, since it uses less digits than its factorization.

1423625809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14159.

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 1423625809 is about 37730.9661816392. The cubic root of 1423625809 is about 1124.9467126036.

The spelling of 1423625809 in words is "one billion, four hundred twenty-three million, six hundred twenty-five thousand, eight hundred nine".