3897855929 has 4 divisors (see below), whose sum is σ = 4252206480. Its totient is φ = 3543505380.

The previous prime is 3897855919. The next prime is 3897856007. The reversal of 3897855929 is 9295587983.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3897855929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3897855919) 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, 177175259 + ... + 177175280.

It is an arithmetic number, because the mean of its divisors is an integer number (1063051620).

Almost surely, 2^3897855929 is an apocalyptic number.

It is an amenable number.

3897855929 is a deficient number, since it is larger than the sum of its proper divisors (354350551).

3897855929 is a wasteful number, since it uses less digits than its factorization.

3897855929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354350550.

The product of its digits is 48988800, while the sum is 65.

The square root of 3897855929 is about 62432.8113174475. The cubic root of 3897855929 is about 1573.7724109036.

The spelling of 3897855929 in words is "three billion, eight hundred ninety-seven million, eight hundred fifty-five thousand, nine hundred twenty-nine".