1321030399 has 8 divisors (see below), whose sum is σ = 1422978032. Its totient is φ = 1219129920.

The previous prime is 1321030379. The next prime is 1321030429. The reversal of 1321030399 is 9930301231.

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

It is a cyclic number.

It is not a de Polignac number, because 1321030399 - 2⁵ = 1321030367 is a prime.

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 1321030399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321030379) 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, 64939 + ... + 82819.

It is an arithmetic number, because the mean of its divisors is an integer number (177872254).

Almost surely, 2^1321030399 is an apocalyptic number.

1321030399 is a deficient number, since it is larger than the sum of its proper divisors (101947633).

1321030399 is a wasteful number, since it uses less digits than its factorization.

1321030399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23577.

The product of its (nonzero) digits is 4374, while the sum is 31.

The square root of 1321030399 is about 36345.9818824585. The cubic root of 1321030399 is about 1097.2466675211.

The spelling of 1321030399 in words is "one billion, three hundred twenty-one million, thirty thousand, three hundred ninety-nine".