3955209609 has 32 divisors (see below), whose sum is σ = 5931757440. Its totient is φ = 2328003072.

The previous prime is 3955209581. The next prime is 3955209649. The reversal of 3955209609 is 9069025593.

It is not a de Polignac number, because 3955209609 - 2¹⁷ = 3955078537 is a prime.

It is a super-2 number, since 2×3955209609² = 31287366102251865762, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3955209649) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61909 + ... + 108365.

It is an arithmetic number, because the mean of its divisors is an integer number (185367420).

Almost surely, 2^3955209609 is an apocalyptic number.

3955209609 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

It is an amenable number.

3955209609 is a deficient number, since it is larger than the sum of its proper divisors (1976547831).

3955209609 is a wasteful number, since it uses less digits than its factorization.

3955209609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46569.

The product of its (nonzero) digits is 656100, while the sum is 48.

The square root of 3955209609 is about 62890.4572172917. The cubic root of 3955209609 is about 1581.4537718531.

The spelling of 3955209609 in words is "three billion, nine hundred fifty-five million, two hundred nine thousand, six hundred nine".