5129172947 has 4 divisors (see below), whose sum is σ = 5131661280. Its totient is φ = 5126684616.

The previous prime is 5129172941. The next prime is 5129172959. The reversal of 5129172947 is 7492719215.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7492719215 = 5 ⋅1498543843.

It is a cyclic number.

It is not a de Polignac number, because 5129172947 - 2⁶ = 5129172883 is a prime.

It is a super-3 number, since 3×5129172947³ (a number of 30 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5129172941) 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, 1241072 + ... + 1245197.

It is an arithmetic number, because the mean of its divisors is an integer number (1282915320).

Almost surely, 2^5129172947 is an apocalyptic number.

5129172947 is a deficient number, since it is larger than the sum of its proper divisors (2488333).

5129172947 is a wasteful number, since it uses less digits than its factorization.

5129172947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2488332.

The product of its digits is 317520, while the sum is 47.

The square root of 5129172947 is about 71618.2445121353. The cubic root of 5129172947 is about 1724.5764356111.

The spelling of 5129172947 in words is "five billion, one hundred twenty-nine million, one hundred seventy-two thousand, nine hundred forty-seven".