319402661 has 4 divisors (see below), whose sum is σ = 319792524. Its totient is φ = 319012800.

The previous prime is 319402639. The next prime is 319402663. The reversal of 319402661 is 166204913.

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 193738561 + 125664100 = 13919^2 + 11210^2 .

It is a cyclic number.

It is not a de Polignac number, because 319402661 - 2¹⁸ = 319140517 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 (319402663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193700 + ... + 195341.

It is an arithmetic number, because the mean of its divisors is an integer number (79948131).

Almost surely, 2^319402661 is an apocalyptic number.

It is an amenable number.

319402661 is a deficient number, since it is larger than the sum of its proper divisors (389863).

319402661 is an equidigital number, since it uses as much as digits as its factorization.

319402661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389862.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 319402661 is about 17871.8398884950. The cubic root of 319402661 is about 683.5645155258.

The spelling of 319402661 in words is "three hundred nineteen million, four hundred two thousand, six hundred sixty-one".