980530021 has 4 divisors (see below), whose sum is σ = 980651200. Its totient is φ = 980408844.

The previous prime is 980529971. The next prime is 980530039. The reversal of 980530021 is 120035089.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 980530021 - 2⁹ = 980529509 is a prime.

It is a super-2 number, since 2×980530021² = 1922878244164520882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (980510021) 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, 47511 + ... + 64948.

It is an arithmetic number, because the mean of its divisors is an integer number (245162800).

Almost surely, 2^980530021 is an apocalyptic number.

It is an amenable number.

980530021 is a deficient number, since it is larger than the sum of its proper divisors (121179).

980530021 is a wasteful number, since it uses less digits than its factorization.

980530021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121178.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 980530021 is about 31313.4159905942. The cubic root of 980530021 is about 993.4674253939.

The spelling of 980530021 in words is "nine hundred eighty million, five hundred thirty thousand, twenty-one".