311779421 has 8 divisors (see below), whose sum is σ = 325848960. Its totient is φ = 297752752.

The previous prime is 311779411. The next prime is 311779441. The reversal of 311779421 is 124977113.

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 311779421 - 2¹⁸ = 311517277 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 (311779411) 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 7 ways as a sum of consecutive naturals, for example, 4640 + ... + 25398.

It is an arithmetic number, because the mean of its divisors is an integer number (40731120).

Almost surely, 2^311779421 is an apocalyptic number.

It is an amenable number.

311779421 is a deficient number, since it is larger than the sum of its proper divisors (14069539).

311779421 is a wasteful number, since it uses less digits than its factorization.

311779421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21435.

The product of its digits is 10584, while the sum is 35.

The square root of 311779421 is about 17657.2767152809. The cubic root of 311779421 is about 678.0824154447.

The spelling of 311779421 in words is "three hundred eleven million, seven hundred seventy-nine thousand, four hundred twenty-one".