988621573 has 2 divisors, whose sum is σ = 988621574. Its totient is φ = 988621572.

The previous prime is 988621567. The next prime is 988621591. The reversal of 988621573 is 375126889.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 543495969 + 445125604 = 23313^2 + 21098^2 .

It is a cyclic number.

It is not a de Polignac number, because 988621573 - 2⁹ = 988621061 is a prime.

It is a super-2 number, since 2×988621573² = 1954745229201988658, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (988621273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494310786 + 494310787.

It is an arithmetic number, because the mean of its divisors is an integer number (494310787).

Almost surely, 2^988621573 is an apocalyptic number.

It is an amenable number.

988621573 is a deficient number, since it is larger than the sum of its proper divisors (1).

988621573 is an equidigital number, since it uses as much as digits as its factorization.

988621573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 725760, while the sum is 49.

The square root of 988621573 is about 31442.3531721148. The cubic root of 988621573 is about 996.1927139692.

The spelling of 988621573 in words is "nine hundred eighty-eight million, six hundred twenty-one thousand, five hundred seventy-three".