1316479821 has 8 divisors (see below), whose sum is σ = 1811929344. Its totient is φ = 849341760.

The previous prime is 1316479811. The next prime is 1316479861. The reversal of 1316479821 is 1289746131.

It is a happy number.

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

It is not a de Polignac number, because 1316479821 - 2⁶ = 1316479757 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1316479811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7077756 + ... + 7077941.

It is an arithmetic number, because the mean of its divisors is an integer number (226491168).

Almost surely, 2^1316479821 is an apocalyptic number.

It is an amenable number.

1316479821 is a deficient number, since it is larger than the sum of its proper divisors (495449523).

1316479821 is a wasteful number, since it uses less digits than its factorization.

1316479821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14155731.

The product of its digits is 72576, while the sum is 42.

The square root of 1316479821 is about 36283.3270387378. The cubic root of 1316479821 is about 1095.9853160717.

The spelling of 1316479821 in words is "one billion, three hundred sixteen million, four hundred seventy-nine thousand, eight hundred twenty-one".