987946637 has 2 divisors, whose sum is σ = 987946638. Its totient is φ = 987946636.

The previous prime is 987946633. The next prime is 987946651. The reversal of 987946637 is 736649789.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 863713321 + 124233316 = 29389^2 + 11146^2 .

It is a cyclic number.

It is not a de Polignac number, because 987946637 - 2² = 987946633 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (987946633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493973318 + 493973319.

It is an arithmetic number, because the mean of its divisors is an integer number (493973319).

Almost surely, 2^987946637 is an apocalyptic number.

It is an amenable number.

987946637 is a deficient number, since it is larger than the sum of its proper divisors (1).

987946637 is an equidigital number, since it uses as much as digits as its factorization.

987946637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13716864, while the sum is 59.

The square root of 987946637 is about 31431.6184279461. The cubic root of 987946637 is about 995.9659607432.

The spelling of 987946637 in words is "nine hundred eighty-seven million, nine hundred forty-six thousand, six hundred thirty-seven".