988703621 has 2 divisors, whose sum is σ = 988703622. Its totient is φ = 988703620.

The previous prime is 988703593. The next prime is 988703633. The reversal of 988703621 is 126307889.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 962550625 + 26152996 = 31025^2 + 5114^2 .

It is an emirp because it is prime and its reverse (126307889) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 988703621 - 2²⁶ = 921594757 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 (988703671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494351810 + 494351811.

It is an arithmetic number, because the mean of its divisors is an integer number (494351811).

Almost surely, 2^988703621 is an apocalyptic number.

It is an amenable number.

988703621 is a deficient number, since it is larger than the sum of its proper divisors (1).

988703621 is an equidigital number, since it uses as much as digits as its factorization.

988703621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 988703621 is about 31443.6578819959. The cubic root of 988703621 is about 996.2202719890.

The spelling of 988703621 in words is "nine hundred eighty-eight million, seven hundred three thousand, six hundred twenty-one".