3894018949 has 4 divisors (see below), whose sum is σ = 3976870464. Its totient is φ = 3811167436.

The previous prime is 3894018923. The next prime is 3894018959. The reversal of 3894018949 is 9498104983.

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: 9498104983 = 79 ⋅120229177.

It is a cyclic number.

It is not a de Polignac number, because 3894018949 - 2²⁹ = 3357148037 is a prime.

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 3894018949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3894018959) 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, 41425687 + ... + 41425780.

It is an arithmetic number, because the mean of its divisors is an integer number (994217616).

Almost surely, 2^3894018949 is an apocalyptic number.

It is an amenable number.

3894018949 is a deficient number, since it is larger than the sum of its proper divisors (82851515).

3894018949 is an equidigital number, since it uses as much as digits as its factorization.

3894018949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82851514.

The product of its (nonzero) digits is 2239488, while the sum is 55.

The square root of 3894018949 is about 62402.0748773629. The cubic root of 3894018949 is about 1573.2558435165.

The spelling of 3894018949 in words is "three billion, eight hundred ninety-four million, eighteen thousand, nine hundred forty-nine".