987912973 has 2 divisors, whose sum is σ = 987912974. Its totient is φ = 987912972.

The previous prime is 987912971. The next prime is 987912977. The reversal of 987912973 is 379219789.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 853399369 + 134513604 = 29213^2 + 11598^2 .

It is a cyclic number.

It is not a de Polignac number, because 987912973 - 2¹ = 987912971 is a prime.

Together with 987912971, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (987912971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493956486 + 493956487.

It is an arithmetic number, because the mean of its divisors is an integer number (493956487).

Almost surely, 2^987912973 is an apocalyptic number.

It is an amenable number.

987912973 is a deficient number, since it is larger than the sum of its proper divisors (1).

987912973 is an equidigital number, since it uses as much as digits as its factorization.

987912973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1714608, while the sum is 55.

The square root of 987912973 is about 31431.0829116656. The cubic root of 987912973 is about 995.9546481960.

The spelling of 987912973 in words is "nine hundred eighty-seven million, nine hundred twelve thousand, nine hundred seventy-three".