988625831 has 4 divisors (see below), whose sum is σ = 993594000. Its totient is φ = 983657664.

The previous prime is 988625821. The next prime is 988625851. The reversal of 988625831 is 138526889.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 138526889 = 439 ⋅315551.

It is a cyclic number.

It is not a de Polignac number, because 988625831 - 2¹⁸ = 988363687 is a prime.

It is a super-2 number, since 2×988625831² = 1954762067440881122, which contains 22 as substring.

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 988625831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (988625821) 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, 2483786 + ... + 2484183.

It is an arithmetic number, because the mean of its divisors is an integer number (248398500).

Almost surely, 2^988625831 is an apocalyptic number.

988625831 is a deficient number, since it is larger than the sum of its proper divisors (4968169).

988625831 is a wasteful number, since it uses less digits than its factorization.

988625831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4968168.

The product of its digits is 829440, while the sum is 50.

The square root of 988625831 is about 31442.4208832590. The cubic root of 988625831 is about 996.1941441701.

The spelling of 988625831 in words is "nine hundred eighty-eight million, six hundred twenty-five thousand, eight hundred thirty-one".