3551889997 has 4 divisors (see below), whose sum is σ = 3552197116. Its totient is φ = 3551582880.

The previous prime is 3551889989. The next prime is 3551890003. The reversal of 3551889997 is 7999881553.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1550311876 + 2001578121 = 39374^2 + 44739^2 .

It is a cyclic number.

It is not a de Polignac number, because 3551889997 - 2³ = 3551889989 is a prime.

It is a super-3 number, since 3×3551889997³ (a number of 30 digits) contains 333 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 (3551289997) 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, 135504 + ... + 159577.

It is an arithmetic number, because the mean of its divisors is an integer number (888049279).

Almost surely, 2^3551889997 is an apocalyptic number.

It is an amenable number.

3551889997 is a deficient number, since it is larger than the sum of its proper divisors (307119).

3551889997 is a wasteful number, since it uses less digits than its factorization.

3551889997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307118.

The product of its digits is 24494400, while the sum is 64.

The square root of 3551889997 is about 59597.7348311159. The cubic root of 3551889997 is about 1525.7609742557.

The spelling of 3551889997 in words is "three billion, five hundred fifty-one million, eight hundred eighty-nine thousand, nine hundred ninety-seven".