3423857781 has 4 divisors (see below), whose sum is σ = 4565143712. Its totient is φ = 2282571852.

The previous prime is 3423857777. The next prime is 3423857803. The reversal of 3423857781 is 1877583243.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1877583243 = 3 ⋅625861081.

It is not a de Polignac number, because 3423857781 - 2² = 3423857777 is a prime.

It is a super-2 number, since 2×3423857781² = 23445604209028487922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3423857781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3423857771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 570642961 + ... + 570642966.

It is an arithmetic number, because the mean of its divisors is an integer number (1141285928).

Almost surely, 2^3423857781 is an apocalyptic number.

It is an amenable number.

3423857781 is a deficient number, since it is larger than the sum of its proper divisors (1141285931).

3423857781 is a wasteful number, since it uses less digits than its factorization.

3423857781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1141285930.

The product of its digits is 1128960, while the sum is 48.

The square root of 3423857781 is about 58513.7401043550. The cubic root of 3423857781 is about 1507.2035404039.

The spelling of 3423857781 in words is "three billion, four hundred twenty-three million, eight hundred fifty-seven thousand, seven hundred eighty-one".