989090727 has 4 divisors (see below), whose sum is σ = 1318787640. Its totient is φ = 659393816.

The previous prime is 989090699. The next prime is 989090749. The reversal of 989090727 is 727090989.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 727090989 = 3 ⋅242363663.

It is a cyclic number.

It is not a de Polignac number, because 989090727 - 2⁸ = 989090471 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 989090727.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989090777) 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, 164848452 + ... + 164848457.

It is an arithmetic number, because the mean of its divisors is an integer number (329696910).

Almost surely, 2^989090727 is an apocalyptic number.

989090727 is a deficient number, since it is larger than the sum of its proper divisors (329696913).

989090727 is a wasteful number, since it uses less digits than its factorization.

989090727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329696912.

The product of its (nonzero) digits is 571536, while the sum is 51.

The square root of 989090727 is about 31449.8128293318. The cubic root of 989090727 is about 996.3502713529.

The spelling of 989090727 in words is "nine hundred eighty-nine million, ninety thousand, seven hundred twenty-seven".