1339468521 has 4 divisors (see below), whose sum is σ = 1785958032. Its totient is φ = 892979012.

The previous prime is 1339468519. The next prime is 1339468541. The reversal of 1339468521 is 1258649331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1339468521 - 2¹ = 1339468519 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1339468541) 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 3 ways as a sum of consecutive naturals, for example, 223244751 + ... + 223244756.

It is an arithmetic number, because the mean of its divisors is an integer number (446489508).

Almost surely, 2^1339468521 is an apocalyptic number.

It is an amenable number.

1339468521 is a deficient number, since it is larger than the sum of its proper divisors (446489511).

1339468521 is an equidigital number, since it uses as much as digits as its factorization.

1339468521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446489510.

The product of its digits is 155520, while the sum is 42.

The square root of 1339468521 is about 36598.7502655487. The cubic root of 1339468521 is about 1102.3279955440.

The spelling of 1339468521 in words is "one billion, three hundred thirty-nine million, four hundred sixty-eight thousand, five hundred twenty-one".