988571091 has 4 divisors (see below), whose sum is σ = 1318094792. Its totient is φ = 659047392.

The previous prime is 988571011. The next prime is 988571107. The reversal of 988571091 is 190175889.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 988571091 - 2⁷ = 988570963 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 988571091.

It is not an unprimeable number, because it can be changed into a prime (988571011) 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, 164761846 + ... + 164761851.

It is an arithmetic number, because the mean of its divisors is an integer number (329523698).

Almost surely, 2^988571091 is an apocalyptic number.

988571091 is a deficient number, since it is larger than the sum of its proper divisors (329523701).

988571091 is a wasteful number, since it uses less digits than its factorization.

988571091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329523700.

The product of its (nonzero) digits is 181440, while the sum is 48.

The square root of 988571091 is about 31441.5503911623. The cubic root of 988571091 is about 996.1757574788.

The spelling of 988571091 in words is "nine hundred eighty-eight million, five hundred seventy-one thousand, ninety-one".