3180784421 has 4 divisors (see below), whose sum is σ = 3185511372. Its totient is φ = 3176057472.

The previous prime is 3180784417. The next prime is 3180784457. The reversal of 3180784421 is 1244870813.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1244870813 = 31 ⋅40157123.

It can be written as a sum of positive squares in 2 ways, for example, as 2499000100 + 681784321 = 49990^2 + 26111^2 .

It is a cyclic number.

It is not a de Polignac number, because 3180784421 - 2² = 3180784417 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 (3180786421) 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, 2362466 + ... + 2363811.

It is an arithmetic number, because the mean of its divisors is an integer number (796377843).

Almost surely, 2^3180784421 is an apocalyptic number.

It is an amenable number.

3180784421 is a deficient number, since it is larger than the sum of its proper divisors (4726951).

3180784421 is an equidigital number, since it uses as much as digits as its factorization.

3180784421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4726950.

The product of its (nonzero) digits is 43008, while the sum is 38.

The square root of 3180784421 is about 56398.4434271018. The cubic root of 3180784421 is about 1470.6570590652.

The spelling of 3180784421 in words is "three billion, one hundred eighty million, seven hundred eighty-four thousand, four hundred twenty-one".