5121437779 has 4 divisors (see below), whose sum is σ = 5121657184. Its totient is φ = 5121218376.

The previous prime is 5121437743. The next prime is 5121437809. The reversal of 5121437779 is 9777341215.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 5121437779 - 2¹³ = 5121429587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5121438779) 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, 69867 + ... + 122980.

It is an arithmetic number, because the mean of its divisors is an integer number (1280414296).

Almost surely, 2^5121437779 is an apocalyptic number.

5121437779 is a deficient number, since it is larger than the sum of its proper divisors (219405).

5121437779 is a wasteful number, since it uses less digits than its factorization.

5121437779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219404.

The product of its digits is 370440, while the sum is 46.

The square root of 5121437779 is about 71564.2213609566. The cubic root of 5121437779 is about 1723.7090703092.

The spelling of 5121437779 in words is "five billion, one hundred twenty-one million, four hundred thirty-seven thousand, seven hundred seventy-nine".