3551897947 has 4 divisors (see below), whose sum is σ = 3825120880. Its totient is φ = 3278675016.

The previous prime is 3551897939. The next prime is 3551897963. The reversal of 3551897947 is 7497981553.

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

It is a cyclic number.

It is not a de Polignac number, because 3551897947 - 2³ = 3551897939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3551897891 and 3551897900.

It is not an unprimeable number, because it can be changed into a prime (3551897977) 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, 136611447 + ... + 136611472.

It is an arithmetic number, because the mean of its divisors is an integer number (956280220).

Almost surely, 2^3551897947 is an apocalyptic number.

3551897947 is a deficient number, since it is larger than the sum of its proper divisors (273222933).

3551897947 is a wasteful number, since it uses less digits than its factorization.

3551897947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273222932.

The product of its digits is 9525600, while the sum is 58.

The square root of 3551897947 is about 59597.8015282443. The cubic root of 3551897947 is about 1525.7621125971.

The spelling of 3551897947 in words is "three billion, five hundred fifty-one million, eight hundred ninety-seven thousand, nine hundred forty-seven".