4349745781 has 4 divisors (see below), whose sum is σ = 4371604000. Its totient is φ = 4327887564.

The previous prime is 4349745779. The next prime is 4349745823. The reversal of 4349745781 is 1875479434.

It is a happy number.

4349745781 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 4349745781 - 2¹ = 4349745779 is a prime.

It is a super-3 number, since 3×4349745781³ (a number of 30 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4349745761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10928811 + ... + 10929208.

It is an arithmetic number, because the mean of its divisors is an integer number (1092901000).

Almost surely, 2^4349745781 is an apocalyptic number.

It is an amenable number.

4349745781 is a deficient number, since it is larger than the sum of its proper divisors (21858219).

4349745781 is a wasteful number, since it uses less digits than its factorization.

4349745781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21858218.

The product of its digits is 3386880, while the sum is 52.

The square root of 4349745781 is about 65952.6025339410. The cubic root of 4349745781 is about 1632.3801004007.

The spelling of 4349745781 in words is "four billion, three hundred forty-nine million, seven hundred forty-five thousand, seven hundred eighty-one".