1423705209 has 8 divisors (see below), whose sum is σ = 1901183232. Its totient is φ = 947682000.

The previous prime is 1423705159. The next prime is 1423705237. The reversal of 1423705209 is 9025073241.

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

It is not a de Polignac number, because 1423705209 - 2¹³ = 1423697017 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1423705209.

It is not an unprimeable number, because it can be changed into a prime (1423705009) 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, 361417 + ... + 365334.

It is an arithmetic number, because the mean of its divisors is an integer number (237647904).

Almost surely, 2^1423705209 is an apocalyptic number.

It is an amenable number.

1423705209 is a deficient number, since it is larger than the sum of its proper divisors (477478023).

1423705209 is an equidigital number, since it uses as much as digits as its factorization.

1423705209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 727407.

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 1423705209 is about 37732.0183531176. The cubic root of 1423705209 is about 1124.9676261301.

The spelling of 1423705209 in words is "one billion, four hundred twenty-three million, seven hundred five thousand, two hundred nine".