4986209521 has 4 divisors (see below), whose sum is σ = 4988105892. Its totient is φ = 4984313152.

The previous prime is 4986209507. The next prime is 4986209533. The reversal of 4986209521 is 1259026894.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1259026894 = 2 ⋅629513447.

It can be written as a sum of positive squares in 2 ways, for example, as 3438180496 + 1548029025 = 58636^2 + 39345^2 .

It is a cyclic number.

It is not a de Polignac number, because 4986209521 - 2⁵ = 4986209489 is a prime.

It is a super-2 number, since 2×4986209521² = 49724570774622098882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4986209821) 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, 944236 + ... + 949501.

It is an arithmetic number, because the mean of its divisors is an integer number (1247026473).

Almost surely, 2^4986209521 is an apocalyptic number.

It is an amenable number.

4986209521 is a deficient number, since it is larger than the sum of its proper divisors (1896371).

4986209521 is a wasteful number, since it uses less digits than its factorization.

4986209521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1896370.

The product of its (nonzero) digits is 311040, while the sum is 46.

The square root of 4986209521 is about 70613.0973757702. The cubic root of 4986209521 is about 1708.4024066385.

The spelling of 4986209521 in words is "four billion, nine hundred eighty-six million, two hundred nine thousand, five hundred twenty-one".