987821353 has 2 divisors, whose sum is σ = 987821354. Its totient is φ = 987821352.

The previous prime is 987821347. The next prime is 987821357. The reversal of 987821353 is 353128789.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 571783744 + 416037609 = 23912^2 + 20397^2 .

It is a cyclic number.

It is not a de Polignac number, because 987821353 - 2⁵ = 987821321 is a prime.

It is not a weakly prime, because it can be changed into another prime (987821357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493910676 + 493910677.

It is an arithmetic number, because the mean of its divisors is an integer number (493910677).

Almost surely, 2^987821353 is an apocalyptic number.

It is an amenable number.

987821353 is a deficient number, since it is larger than the sum of its proper divisors (1).

987821353 is an equidigital number, since it uses as much as digits as its factorization.

987821353 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 46.

The square root of 987821353 is about 31429.6254034311. The cubic root of 987821353 is about 995.9238586466.

The spelling of 987821353 in words is "nine hundred eighty-seven million, eight hundred twenty-one thousand, three hundred fifty-three".