1308823421 has 4 divisors (see below), whose sum is σ = 1385813052. Its totient is φ = 1231833792.

The previous prime is 1308823403. The next prime is 1308823423. The reversal of 1308823421 is 1243288031.

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

It can be written as a sum of positive squares in 2 ways, for example, as 931104196 + 377719225 = 30514^2 + 19435^2 .

It is a cyclic number.

It is not a de Polignac number, because 1308823421 - 2⁶ = 1308823357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1308823423) 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, 38494790 + ... + 38494823.

It is an arithmetic number, because the mean of its divisors is an integer number (346453263).

Almost surely, 2^1308823421 is an apocalyptic number.

It is an amenable number.

1308823421 is a deficient number, since it is larger than the sum of its proper divisors (76989631).

1308823421 is an equidigital number, since it uses as much as digits as its factorization.

1308823421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76989630.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 1308823421 is about 36177.6646703460. The cubic root of 1308823421 is about 1093.8565020385.

The spelling of 1308823421 in words is "one billion, three hundred eight million, eight hundred twenty-three thousand, four hundred twenty-one".