5125921909 has 4 divisors (see below), whose sum is σ = 5136447904. Its totient is φ = 5115395916.

The previous prime is 5125921903. The next prime is 5125921949. The reversal of 5125921909 is 9091295215.

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 not a de Polignac number, because 5125921909 - 2³ = 5125921901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5125921901) 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, 5262267 + ... + 5263240.

It is an arithmetic number, because the mean of its divisors is an integer number (1284111976).

Almost surely, 2^5125921909 is an apocalyptic number.

It is an amenable number.

5125921909 is a deficient number, since it is larger than the sum of its proper divisors (10525995).

5125921909 is a wasteful number, since it uses less digits than its factorization.

5125921909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10525994.

The product of its (nonzero) digits is 72900, while the sum is 43.

The square root of 5125921909 is about 71595.5439185987. The cubic root of 5125921909 is about 1724.2119942373.

The spelling of 5125921909 in words is "five billion, one hundred twenty-five million, nine hundred twenty-one thousand, nine hundred nine".