987626317 has 2 divisors, whose sum is σ = 987626318. Its totient is φ = 987626316.

The previous prime is 987626281. The next prime is 987626323. The reversal of 987626317 is 713626789.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 851530761 + 136095556 = 29181^2 + 11666^2 .

It is a cyclic number.

It is not a de Polignac number, because 987626317 - 2¹¹ = 987624269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (987626357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493813158 + 493813159.

It is an arithmetic number, because the mean of its divisors is an integer number (493813159).

Almost surely, 2^987626317 is an apocalyptic number.

It is an amenable number.

987626317 is a deficient number, since it is larger than the sum of its proper divisors (1).

987626317 is an equidigital number, since it uses as much as digits as its factorization.

987626317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 762048, while the sum is 49.

The square root of 987626317 is about 31426.5225088618. The cubic root of 987626317 is about 995.8583090779.

The spelling of 987626317 in words is "nine hundred eighty-seven million, six hundred twenty-six thousand, three hundred seventeen".