988109947 has 4 divisors (see below), whose sum is σ = 1077938136. Its totient is φ = 898281760.

The previous prime is 988109939. The next prime is 988109971. The reversal of 988109947 is 749901889.

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

It is a cyclic number.

It is not a de Polignac number, because 988109947 - 2³ = 988109939 is a prime.

It is a super-2 number, since 2×988109947² = 1952722534720685618, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (988109917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44914078 + ... + 44914099.

It is an arithmetic number, because the mean of its divisors is an integer number (269484534).

Almost surely, 2^988109947 is an apocalyptic number.

988109947 is a deficient number, since it is larger than the sum of its proper divisors (89828189).

988109947 is a wasteful number, since it uses less digits than its factorization.

988109947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89828188.

The product of its (nonzero) digits is 1306368, while the sum is 55.

The square root of 988109947 is about 31434.2161823704. The cubic root of 988109947 is about 996.0208362576.

The spelling of 988109947 in words is "nine hundred eighty-eight million, one hundred nine thousand, nine hundred forty-seven".