1423630331 has 4 divisors (see below), whose sum is σ = 1458353064. Its totient is φ = 1388907600.

The previous prime is 1423630289. The next prime is 1423630349. The reversal of 1423630331 is 1330363241.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1423630331 is a prime.

It is a super-2 number, since 2×1423630331² = 4053446638686339122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1423630331.

It is not an unprimeable number, because it can be changed into a prime (1423639331) 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, 17361305 + ... + 17361386.

It is an arithmetic number, because the mean of its divisors is an integer number (364588266).

Almost surely, 2^1423630331 is an apocalyptic number.

1423630331 is a deficient number, since it is larger than the sum of its proper divisors (34722733).

1423630331 is an equidigital number, since it uses as much as digits as its factorization.

1423630331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34722732.

The product of its (nonzero) digits is 3888, while the sum is 26.

The square root of 1423630331 is about 37731.0261058456. The cubic root of 1423630331 is about 1124.9479036946.

Adding to 1423630331 its reverse (1330363241), we get a palindrome (2753993572).

The spelling of 1423630331 in words is "one billion, four hundred twenty-three million, six hundred thirty thousand, three hundred thirty-one".