1321604479 has 4 divisors (see below), whose sum is σ = 1423266376. Its totient is φ = 1219942584.

The previous prime is 1321604461. The next prime is 1321604503. The reversal of 1321604479 is 9744061231.

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

It is a cyclic number.

It is not a de Polignac number, because 1321604479 - 2⁹ = 1321603967 is a prime.

It is a super-3 number, since 3×1321604479³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321604419) 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, 50830929 + ... + 50830954.

It is an arithmetic number, because the mean of its divisors is an integer number (355816594).

Almost surely, 2^1321604479 is an apocalyptic number.

1321604479 is a deficient number, since it is larger than the sum of its proper divisors (101661897).

1321604479 is a wasteful number, since it uses less digits than its factorization.

1321604479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101661896.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 1321604479 is about 36353.8784588385. The cubic root of 1321604479 is about 1097.4055879474.

The spelling of 1321604479 in words is "one billion, three hundred twenty-one million, six hundred four thousand, four hundred seventy-nine".