3865142929 has 4 divisors (see below), whose sum is σ = 3865292784. Its totient is φ = 3864993076.

The previous prime is 3865142873. The next prime is 3865142959. The reversal of 3865142929 is 9292415683.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9292415683 = 29 ⋅320428127.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3865142929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3865142959) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25267 + ... + 91480.

It is an arithmetic number, because the mean of its divisors is an integer number (966323196).

Almost surely, 2^3865142929 is an apocalyptic number.

It is an amenable number.

3865142929 is a deficient number, since it is larger than the sum of its proper divisors (149855).

3865142929 is a wasteful number, since it uses less digits than its factorization.

3865142929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149854.

The product of its digits is 933120, while the sum is 49.

The square root of 3865142929 is about 62170.2736764123. The cubic root of 3865142929 is about 1569.3573754438.

The spelling of 3865142929 in words is "three billion, eight hundred sixty-five million, one hundred forty-two thousand, nine hundred twenty-nine".