988989901 has 2 divisors, whose sum is σ = 988989902. Its totient is φ = 988989900.

The previous prime is 988989803. The next prime is 988989907. The reversal of 988989901 is 109989889.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 917181225 + 71808676 = 30285^2 + 8474^2 .

It is a cyclic number.

It is not a de Polignac number, because 988989901 - 2¹⁹ = 988465613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 988989901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (988989907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494494950 + 494494951.

It is an arithmetic number, because the mean of its divisors is an integer number (494494951).

Almost surely, 2^988989901 is an apocalyptic number.

It is an amenable number.

988989901 is a deficient number, since it is larger than the sum of its proper divisors (1).

988989901 is an equidigital number, since it uses as much as digits as its factorization.

988989901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3359232, while the sum is 61.

The square root of 988989901 is about 31448.2098218643. The cubic root of 988989901 is about 996.3164148611.

The spelling of 988989901 in words is "nine hundred eighty-eight million, nine hundred eighty-nine thousand, nine hundred one".