3668981941 has 4 divisors (see below), whose sum is σ = 3669800512. Its totient is φ = 3668163372.

The previous prime is 3668981933. The next prime is 3668981963. The reversal of 3668981941 is 1491898663.

3668981941 is digitally balanced in base 2, 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, and also an emirpimes, since its reverse is a distinct semiprime: 1491898663 = 337 ⋅4426999.

It is a cyclic number.

It is not a de Polignac number, because 3668981941 - 2³ = 3668981933 is a prime.

It is a super-2 number, since 2×3668981941² = 26922856966768254962, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3668981441) 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, 402525 + ... + 411538.

It is an arithmetic number, because the mean of its divisors is an integer number (917450128).

Almost surely, 2^3668981941 is an apocalyptic number.

It is an amenable number.

3668981941 is a deficient number, since it is larger than the sum of its proper divisors (818571).

3668981941 is an equidigital number, since it uses as much as digits as its factorization.

3668981941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 818570.

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

The square root of 3668981941 is about 60572.1218135868. The cubic root of 3668981941 is about 1542.3461653642.

The spelling of 3668981941 in words is "three billion, six hundred sixty-eight million, nine hundred eighty-one thousand, nine hundred forty-one".