1423531906 has 4 divisors (see below), whose sum is σ = 2135297862. Its totient is φ = 711765952.

The previous prime is 1423531897. The next prime is 1423531937. The reversal of 1423531906 is 6091353241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6091353241 = 19 ⋅320597539.

It can be written as a sum of positive squares in only one way, i.e., 1418652225 + 4879681 = 37665^2 + 2209^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 355882975 + ... + 355882978.

Almost surely, 2^1423531906 is an apocalyptic number.

1423531906 is a deficient number, since it is larger than the sum of its proper divisors (711765956).

1423531906 is an equidigital number, since it uses as much as digits as its factorization.

1423531906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711765955.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 1423531906 is about 37729.7217853511. The cubic root of 1423531906 is about 1124.9219780623.

The spelling of 1423531906 in words is "one billion, four hundred twenty-three million, five hundred thirty-one thousand, nine hundred six".