3944994493 has 4 divisors (see below), whose sum is σ = 4303630368. Its totient is φ = 3586358620.

The previous prime is 3944994479. The next prime is 3944994499.

3944994493 is nontrivially palindromic in base 10.

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 3944994493 - 2⁹ = 3944993981 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 (3944994499) 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, 179317921 + ... + 179317942.

It is an arithmetic number, because the mean of its divisors is an integer number (1075907592).

Almost surely, 2^3944994493 is an apocalyptic number.

It is an amenable number.

3944994493 is a deficient number, since it is larger than the sum of its proper divisors (358635875).

3944994493 is a wasteful number, since it uses less digits than its factorization.

3944994493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358635874.

The product of its digits is 15116544, while the sum is 58.

The square root of 3944994493 is about 62809.1911506588. The cubic root of 3944994493 is about 1580.0911250386.

The spelling of 3944994493 in words is "three billion, nine hundred forty-four million, nine hundred ninety-four thousand, four hundred ninety-three".