980208521 has 6 divisors (see below), whose sum is σ = 1003536090. Its totient is φ = 957411168.

The previous prime is 980208517. The next prime is 980208539. The reversal of 980208521 is 125802089.

It can be written as a sum of positive squares in only one way, i.e., 977250121 + 2958400 = 31261^2 + 1720^2 .

It is not a de Polignac number, because 980208521 - 2² = 980208517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (980208511) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 263216 + ... + 266913.

It is an arithmetic number, because the mean of its divisors is an integer number (167256015).

Almost surely, 2^980208521 is an apocalyptic number.

It is an amenable number.

980208521 is a deficient number, since it is larger than the sum of its proper divisors (23327569).

980208521 is an equidigital number, since it uses as much as digits as its factorization.

980208521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530215 (or 530172 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 980208521 is about 31308.2819873592. The cubic root of 980208521 is about 993.3588328689.

The spelling of 980208521 in words is "nine hundred eighty million, two hundred eight thousand, five hundred twenty-one".