988871531 has 2 divisors, whose sum is σ = 988871532. Its totient is φ = 988871530.

The previous prime is 988871503. The next prime is 988871581. The reversal of 988871531 is 135178889.

It is an a-pointer prime, because the next prime (988871581) can be obtained adding 988871531 to its sum of digits (50).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 988871531 - 2⁶ = 988871467 is a prime.

It is a super-2 number, since 2×988871531² = 1955733809644567922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 988871531.

It is not a weakly prime, because it can be changed into another prime (988871581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494435765 + 494435766.

It is an arithmetic number, because the mean of its divisors is an integer number (494435766).

Almost surely, 2^988871531 is an apocalyptic number.

988871531 is a deficient number, since it is larger than the sum of its proper divisors (1).

988871531 is an equidigital number, since it uses as much as digits as its factorization.

988871531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 483840, while the sum is 50.

The square root of 988871531 is about 31446.3277824295. The cubic root of 988871531 is about 996.2766643105.

The spelling of 988871531 in words is "nine hundred eighty-eight million, eight hundred seventy-one thousand, five hundred thirty-one".