1421312329 has 2 divisors, whose sum is σ = 1421312330. Its totient is φ = 1421312328.

The previous prime is 1421312323. The next prime is 1421312369. The reversal of 1421312329 is 9232131241.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 978125625 + 443186704 = 31275^2 + 21052^2 .

It is a cyclic number.

It is not a de Polignac number, because 1421312329 - 2⁵ = 1421312297 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1421312297 and 1421312306.

It is not a weakly prime, because it can be changed into another prime (1421312323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710656164 + 710656165.

It is an arithmetic number, because the mean of its divisors is an integer number (710656165).

Almost surely, 2^1421312329 is an apocalyptic number.

It is an amenable number.

1421312329 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421312329 is an equidigital number, since it uses as much as digits as its factorization.

1421312329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 28.

The square root of 1421312329 is about 37700.2961394204. The cubic root of 1421312329 is about 1124.3370128866.

It can be divided in two parts, 142131232 and 9, that added together give a palindrome (142131241).

The spelling of 1421312329 in words is "one billion, four hundred twenty-one million, three hundred twelve thousand, three hundred twenty-nine".