987199097 has 2 divisors, whose sum is σ = 987199098. Its totient is φ = 987199096.

The previous prime is 987199049. The next prime is 987199099. The reversal of 987199097 is 790991789.

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., 715081081 + 272118016 = 26741^2 + 16496^2 .

It is a cyclic number.

It is not a de Polignac number, because 987199097 - 2⁸ = 987198841 is a prime.

Together with 987199099, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (987199099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493599548 + 493599549.

It is an arithmetic number, because the mean of its divisors is an integer number (493599549).

Almost surely, 2^987199097 is an apocalyptic number.

It is an amenable number.

987199097 is a deficient number, since it is larger than the sum of its proper divisors (1).

987199097 is an equidigital number, since it uses as much as digits as its factorization.

987199097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2571912, while the sum is 59.

The square root of 987199097 is about 31419.7246486980. The cubic root of 987199097 is about 995.7146947236.

The spelling of 987199097 in words is "nine hundred eighty-seven million, one hundred ninety-nine thousand, ninety-seven".