3929148217 has 4 divisors (see below), whose sum is σ = 3932960256. Its totient is φ = 3925336180.

The previous prime is 3929148193. The next prime is 3929148229. The reversal of 3929148217 is 7128419293.

It is a happy number.

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: 7128419293 = 829 ⋅8598817.

It is a cyclic number.

It is not a de Polignac number, because 3929148217 - 2³¹ = 1781664569 is a prime.

It is a super-2 number, since 2×3929148217² = 30876411422308558178, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3929148017) 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, 1904473 + ... + 1906534.

It is an arithmetic number, because the mean of its divisors is an integer number (983240064).

Almost surely, 2^3929148217 is an apocalyptic number.

It is an amenable number.

3929148217 is a deficient number, since it is larger than the sum of its proper divisors (3812039).

3929148217 is a wasteful number, since it uses less digits than its factorization.

3929148217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3812038.

The product of its digits is 217728, while the sum is 46.

The square root of 3929148217 is about 62682.9180638553. The cubic root of 3929148217 is about 1577.9726463656.

The spelling of 3929148217 in words is "three billion, nine hundred twenty-nine million, one hundred forty-eight thousand, two hundred seventeen".