988433861 has 2 divisors, whose sum is σ = 988433862. Its totient is φ = 988433860.

The previous prime is 988433857. The next prime is 988433869. The reversal of 988433861 is 168334889.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 903904225 + 84529636 = 30065^2 + 9194^2 .

It is a cyclic number.

It is not a de Polignac number, because 988433861 - 2² = 988433857 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (988433869) 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 as a sum of consecutive naturals, namely, 494216930 + 494216931.

It is an arithmetic number, because the mean of its divisors is an integer number (494216931).

Almost surely, 2^988433861 is an apocalyptic number.

It is an amenable number.

988433861 is a deficient number, since it is larger than the sum of its proper divisors (1).

988433861 is an equidigital number, since it uses as much as digits as its factorization.

988433861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 995328, while the sum is 50.

The square root of 988433861 is about 31439.3680120959. The cubic root of 988433861 is about 996.1296601279.

The spelling of 988433861 in words is "nine hundred eighty-eight million, four hundred thirty-three thousand, eight hundred sixty-one".