4920915217 has 4 divisors (see below), whose sum is σ = 5210380836. Its totient is φ = 4631449600.

The previous prime is 4920915211. The next prime is 4920915247. The reversal of 4920915217 is 7125190294.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7125190294 = 2 ⋅3562595147.

It can be written as a sum of positive squares in 2 ways, for example, as 3599520016 + 1321395201 = 59996^2 + 36351^2 .

It is a cyclic number.

It is not a de Polignac number, because 4920915217 - 2³¹ = 2773431569 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4920915217.

It is not an unprimeable number, because it can be changed into a prime (4920915211) 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, 144732784 + ... + 144732817.

It is an arithmetic number, because the mean of its divisors is an integer number (1302595209).

Almost surely, 2^4920915217 is an apocalyptic number.

It is an amenable number.

4920915217 is a deficient number, since it is larger than the sum of its proper divisors (289465619).

4920915217 is a wasteful number, since it uses less digits than its factorization.

4920915217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289465618.

The product of its (nonzero) digits is 45360, while the sum is 40.

The square root of 4920915217 is about 70149.2353272650. The cubic root of 4920915217 is about 1700.9124533020.

The spelling of 4920915217 in words is "four billion, nine hundred twenty million, nine hundred fifteen thousand, two hundred seventeen".