987555253 has 2 divisors, whose sum is σ = 987555254. Its totient is φ = 987555252.

The previous prime is 987555227. The next prime is 987555263. The reversal of 987555253 is 352555789.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 963916209 + 23639044 = 31047^2 + 4862^2 .

It is a cyclic number.

It is not a de Polignac number, because 987555253 - 2¹³ = 987547061 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 987555197 and 987555206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (987555203) 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, 493777626 + 493777627.

It is an arithmetic number, because the mean of its divisors is an integer number (493777627).

Almost surely, 2^987555253 is an apocalyptic number.

It is an amenable number.

987555253 is a deficient number, since it is larger than the sum of its proper divisors (1).

987555253 is an equidigital number, since it uses as much as digits as its factorization.

987555253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1890000, while the sum is 49.

The square root of 987555253 is about 31425.3918511767. The cubic root of 987555253 is about 995.8344230625.

The spelling of 987555253 in words is "nine hundred eighty-seven million, five hundred fifty-five thousand, two hundred fifty-three".