3974551613 has 4 divisors (see below), whose sum is σ = 4183738560. Its totient is φ = 3765364668.

The previous prime is 3974551583. The next prime is 3974551643. The reversal of 3974551613 is 3161554793.

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: 3161554793 = 113 ⋅27978361.

It is an interprime number because it is at equal distance from previous prime (3974551583) and next prime (3974551643).

It is a cyclic number.

It is not a de Polignac number, because 3974551613 - 2¹⁶ = 3974486077 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 (3974551643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104593445 + ... + 104593482.

It is an arithmetic number, because the mean of its divisors is an integer number (1045934640).

Almost surely, 2^3974551613 is an apocalyptic number.

It is an amenable number.

3974551613 is a deficient number, since it is larger than the sum of its proper divisors (209186947).

3974551613 is a wasteful number, since it uses less digits than its factorization.

3974551613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209186946.

The product of its digits is 340200, while the sum is 44.

The square root of 3974551613 is about 63044.0450240941. The cubic root of 3974551613 is about 1584.0274878161.

The spelling of 3974551613 in words is "three billion, nine hundred seventy-four million, five hundred fifty-one thousand, six hundred thirteen".