4992902521 has 4 divisors (see below), whose sum is σ = 5074753444. Its totient is φ = 4911051600.

The previous prime is 4992902503. The next prime is 4992902531. The reversal of 4992902521 is 1252092994.

4992902521 = 49964² + 49965².

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

It can be written as a sum of positive squares in 2 ways, for example, as 2496501225 + 2496401296 = 49965^2 + 49964^2 .

It is a cyclic number.

It is not a de Polignac number, because 4992902521 - 2⁷ = 4992902393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4992902531) 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, 40925370 + ... + 40925491.

It is an arithmetic number, because the mean of its divisors is an integer number (1268688361).

Almost surely, 2^4992902521 is an apocalyptic number.

4992902521 is the 49965-th centered square number.

It is an amenable number.

4992902521 is a deficient number, since it is larger than the sum of its proper divisors (81850923).

4992902521 is an equidigital number, since it uses as much as digits as its factorization.

4992902521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81850922.

The product of its (nonzero) digits is 116640, while the sum is 43.

The square root of 4992902521 is about 70660.4735407286. The cubic root of 4992902521 is about 1709.1664623111.

The spelling of 4992902521 in words is "four billion, nine hundred ninety-two million, nine hundred two thousand, five hundred twenty-one".