989020399 has 8 divisors (see below), whose sum is σ = 997157088. Its totient is φ = 980897280.

The previous prime is 989020393. The next prime is 989020423. The reversal of 989020399 is 993020989.

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 989020399 - 2³ = 989020391 is a prime.

It is a super-2 number, since 2×989020399² = 1956322699276238402, 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 (989020391) 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, 184639 + ... + 189919.

It is an arithmetic number, because the mean of its divisors is an integer number (124644636).

Almost surely, 2^989020399 is an apocalyptic number.

989020399 is a deficient number, since it is larger than the sum of its proper divisors (8136689).

989020399 is a wasteful number, since it uses less digits than its factorization.

989020399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6785.

The product of its (nonzero) digits is 314928, while the sum is 49.

The square root of 989020399 is about 31448.6947105917. The cubic root of 989020399 is about 996.3266560664.

The spelling of 989020399 in words is "nine hundred eighty-nine million, twenty thousand, three hundred ninety-nine".