3543939961 has 9 divisors (see below), whose sum is σ = 3608601231. Its totient is φ = 3480420384.

The previous prime is 3543939947. The next prime is 3543939977. The reversal of 3543939961 is 1699393453.

The square root of 3543939961 is 59531.

It is a perfect power (a square), and thus also a powerful number.

3543939961 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1087746361 + 2456193600 = 32981^2 + 49560^2 .

It is not a de Polignac number, because 3543939961 - 2⁵ = 3543939929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3543939899 and 3543939908.

It is not an unprimeable number, because it can be changed into a prime (3543939361) 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 8 ways as a sum of consecutive naturals, for example, 3511825 + ... + 3512833.

Almost surely, 2^3543939961 is an apocalyptic number.

3543939961 is the 59531-st square number.

3543939961 is the 29766-th centered octagonal number.

It is an amenable number.

3543939961 is a deficient number, since it is larger than the sum of its proper divisors (64661270).

3543939961 is an frugal number, since it uses more digits than its factorization.

3543939961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2136 (or 1068 counting only the distinct ones).

The product of its digits is 2361960, while the sum is 52.

The cubic root of 3543939961 is about 1524.6217764524.

The spelling of 3543939961 in words is "three billion, five hundred forty-three million, nine hundred thirty-nine thousand, nine hundred sixty-one".