988742747 has 4 divisors (see below), whose sum is σ = 992845656. Its totient is φ = 984639840.

The previous prime is 988742683. The next prime is 988742753. The reversal of 988742747 is 747247889.

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: 747247889 = 577 ⋅1295057.

It is a cyclic number.

It is not a de Polignac number, because 988742747 - 2⁶ = 988742683 is a prime.

It is a super-2 number, since 2×988742747² = 1955224439490212018, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 988742692 and 988742701.

It is not an unprimeable number, because it can be changed into a prime (988732747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2051093 + ... + 2051574.

It is an arithmetic number, because the mean of its divisors is an integer number (248211414).

Almost surely, 2^988742747 is an apocalyptic number.

988742747 is a deficient number, since it is larger than the sum of its proper divisors (4102909).

988742747 is a wasteful number, since it uses less digits than its factorization.

988742747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4102908.

The product of its digits is 6322176, while the sum is 56.

The square root of 988742747 is about 31444.2800362800. The cubic root of 988742747 is about 996.2334129679.

The spelling of 988742747 in words is "nine hundred eighty-eight million, seven hundred forty-two thousand, seven hundred forty-seven".