987356761 has 2 divisors, whose sum is σ = 987356762. Its totient is φ = 987356760.

The previous prime is 987356759. The next prime is 987356791. The reversal of 987356761 is 167653789.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 579316761 + 408040000 = 24069^2 + 20200^2 .

It is an emirp because it is prime and its reverse (167653789) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 987356761 - 2¹ = 987356759 is a prime.

It is a super-2 number, since 2×987356761² = 1949746746984822242, which contains 22 as substring.

Together with 987356759, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 987356699 and 987356708.

It is not a weakly prime, because it can be changed into another prime (987356701) 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, 493678380 + 493678381.

It is an arithmetic number, because the mean of its divisors is an integer number (493678381).

Almost surely, 2^987356761 is an apocalyptic number.

It is an amenable number.

987356761 is a deficient number, since it is larger than the sum of its proper divisors (1).

987356761 is an equidigital number, since it uses as much as digits as its factorization.

987356761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1905120, while the sum is 52.

The square root of 987356761 is about 31422.2335456918. The cubic root of 987356761 is about 995.7676999061.

The spelling of 987356761 in words is "nine hundred eighty-seven million, three hundred fifty-six thousand, seven hundred sixty-one".