3949574981 has 8 divisors (see below), whose sum is σ = 4312377984. Its totient is φ = 3587397120.

The previous prime is 3949574947. The next prime is 3949575013. The reversal of 3949574981 is 1894759493.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3949574981 - 2³⁰ = 2875833157 is a prime.

It is a super-2 number, since 2×3949574981² = 31198285061082300722, which contains 22 as substring.

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 3949574981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3949570981) 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 7 ways as a sum of consecutive naturals, for example, 143021 + ... + 168386.

It is an arithmetic number, because the mean of its divisors is an integer number (539047248).

Almost surely, 2^3949574981 is an apocalyptic number.

It is an amenable number.

3949574981 is a deficient number, since it is larger than the sum of its proper divisors (362803003).

3949574981 is a wasteful number, since it uses less digits than its factorization.

3949574981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312571.

The product of its digits is 9797760, while the sum is 59.

The square root of 3949574981 is about 62845.6440893082. The cubic root of 3949574981 is about 1580.7024304194.

The spelling of 3949574981 in words is "three billion, nine hundred forty-nine million, five hundred seventy-four thousand, nine hundred eighty-one".