988871491 has 2 divisors, whose sum is σ = 988871492. Its totient is φ = 988871490.

The previous prime is 988871483. The next prime is 988871503. The reversal of 988871491 is 194178889.

It is a weak prime.

It is an emirp because it is prime and its reverse (194178889) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 988871491 - 2³ = 988871483 is a prime.

It is a weakly prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494435745 + 494435746.

It is an arithmetic number, because the mean of its divisors is an integer number (494435746).

Almost surely, 2^988871491 is an apocalyptic number.

988871491 is a deficient number, since it is larger than the sum of its proper divisors (1).

988871491 is an equidigital number, since it uses as much as digits as its factorization.

988871491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1161216, while the sum is 55.

The square root of 988871491 is about 31446.3271464252. The cubic root of 988871491 is about 996.2766508773.

The spelling of 988871491 in words is "nine hundred eighty-eight million, eight hundred seventy-one thousand, four hundred ninety-one".