3941394551 has 4 divisors (see below), whose sum is σ = 3943076232. Its totient is φ = 3939712872.

The previous prime is 3941394521. The next prime is 3941394557. The reversal of 3941394551 is 1554931493.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1554931493 = 3673 ⋅423341.

It is a cyclic number.

It is not a de Polignac number, because 3941394551 - 2¹⁴ = 3941378167 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 (3941394557) 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, 837320 + ... + 842013.

It is an arithmetic number, because the mean of its divisors is an integer number (985769058).

Almost surely, 2^3941394551 is an apocalyptic number.

3941394551 is a deficient number, since it is larger than the sum of its proper divisors (1681681).

3941394551 is a wasteful number, since it uses less digits than its factorization.

3941394551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1681680.

The product of its digits is 291600, while the sum is 44.

The square root of 3941394551 is about 62780.5268455116. The cubic root of 3941394551 is about 1579.6103497567.

The spelling of 3941394551 in words is "three billion, nine hundred forty-one million, three hundred ninety-four thousand, five hundred fifty-one".