988620761 has 2 divisors, whose sum is σ = 988620762. Its totient is φ = 988620760.

The previous prime is 988620751. The next prime is 988620767. The reversal of 988620761 is 167026889.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 973752025 + 14868736 = 31205^2 + 3856^2 .

It is an emirp because it is prime and its reverse (167026889) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-988620761 is a prime.

It is not a weakly prime, because it can be changed into another prime (988620767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494310380 + 494310381.

It is an arithmetic number, because the mean of its divisors is an integer number (494310381).

Almost surely, 2^988620761 is an apocalyptic number.

It is an amenable number.

988620761 is a deficient number, since it is larger than the sum of its proper divisors (1).

988620761 is an equidigital number, since it uses as much as digits as its factorization.

988620761 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 290304, while the sum is 47.

The square root of 988620761 is about 31442.3402595926. The cubic root of 988620761 is about 996.1924412296.

The spelling of 988620761 in words is "nine hundred eighty-eight million, six hundred twenty thousand, seven hundred sixty-one".