980392921 has 4 divisors (see below), whose sum is σ = 994201344. Its totient is φ = 966584500.

The previous prime is 980392891. The next prime is 980392927. The reversal of 980392921 is 129293089.

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, and also an emirpimes, since its reverse is a distinct semiprime: 129293089 = 8219 ⋅15731.

It is a cyclic number.

It is not a de Polignac number, because 980392921 - 2¹⁵ = 980360153 is a prime.

It is a super-2 number, since 2×980392921² = 1922340559093824482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (980392927) 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, 6904105 + ... + 6904246.

It is an arithmetic number, because the mean of its divisors is an integer number (248550336).

Almost surely, 2^980392921 is an apocalyptic number.

It is an amenable number.

980392921 is a deficient number, since it is larger than the sum of its proper divisors (13808423).

980392921 is a wasteful number, since it uses less digits than its factorization.

980392921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13808422.

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 980392921 is about 31311.2267565485. The cubic root of 980392921 is about 993.4211202563.

The spelling of 980392921 in words is "nine hundred eighty million, three hundred ninety-two thousand, nine hundred twenty-one".