978032021 has 8 divisors (see below), whose sum is σ = 982632384. Its totient is φ = 973440160.

The previous prime is 978032017. The next prime is 978032023. The reversal of 978032021 is 120230879.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 978032021 - 2² = 978032017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978032023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 365936 + ... + 368598.

It is an arithmetic number, because the mean of its divisors is an integer number (122829048).

Almost surely, 2^978032021 is an apocalyptic number.

It is an amenable number.

978032021 is a deficient number, since it is larger than the sum of its proper divisors (4600363).

978032021 is a wasteful number, since it uses less digits than its factorization.

978032021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4251.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 978032021 is about 31273.5034973698. The cubic root of 978032021 is about 992.6230548294.

The spelling of 978032021 in words is "nine hundred seventy-eight million, thirty-two thousand, twenty-one".