3551971009 has 4 divisors (see below), whose sum is σ = 3553233840. Its totient is φ = 3550708180.

The previous prime is 3551970991. The next prime is 3551971021. The reversal of 3551971009 is 9001791553.

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: 9001791553 = 271 ⋅33216943.

It is a cyclic number.

It is not a de Polignac number, because 3551971009 - 2¹¹ = 3551968961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3551971039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 627187 + ... + 632824.

It is an arithmetic number, because the mean of its divisors is an integer number (888308460).

Almost surely, 2^3551971009 is an apocalyptic number.

It is an amenable number.

3551971009 is a deficient number, since it is larger than the sum of its proper divisors (1262831).

3551971009 is a wasteful number, since it uses less digits than its factorization.

3551971009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1262830.

The product of its (nonzero) digits is 42525, while the sum is 40.

The square root of 3551971009 is about 59598.4144839441. The cubic root of 3551971009 is about 1525.7725740902.

The spelling of 3551971009 in words is "three billion, five hundred fifty-one million, nine hundred seventy-one thousand, nine".