988749643 has 4 divisors (see below), whose sum is σ = 1129999600. Its totient is φ = 847499688.

The previous prime is 988749623. The next prime is 988749647. The reversal of 988749643 is 346947889.

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

It is not a de Polignac number, because 988749643 - 2¹⁷ = 988618571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (988749647) 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, 70624968 + ... + 70624981.

It is an arithmetic number, because the mean of its divisors is an integer number (282499900).

Almost surely, 2^988749643 is an apocalyptic number.

988749643 is a deficient number, since it is larger than the sum of its proper divisors (141249957).

988749643 is a wasteful number, since it uses less digits than its factorization.

988749643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141249956.

The product of its digits is 10450944, while the sum is 58.

The square root of 988749643 is about 31444.3896903724. The cubic root of 988749643 is about 996.2357290437.

The spelling of 988749643 in words is "nine hundred eighty-eight million, seven hundred forty-nine thousand, six hundred forty-three".