987199049 has 2 divisors, whose sum is σ = 987199050. Its totient is φ = 987199048.

The previous prime is 987199039. The next prime is 987199097. The reversal of 987199049 is 940991789.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 825527824 + 161671225 = 28732^2 + 12715^2 .

It is an emirp because it is prime and its reverse (940991789) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 987199049 - 2¹² = 987194953 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 987198985 and 987199003.

It is not a weakly prime, because it can be changed into another prime (987199009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493599524 + 493599525.

It is an arithmetic number, because the mean of its divisors is an integer number (493599525).

Almost surely, 2^987199049 is an apocalyptic number.

It is an amenable number.

987199049 is a deficient number, since it is larger than the sum of its proper divisors (1).

987199049 is an equidigital number, since it uses as much as digits as its factorization.

987199049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1469664, while the sum is 56.

The square root of 987199049 is about 31419.7238848466. The cubic root of 987199049 is about 995.7146785856.

The spelling of 987199049 in words is "nine hundred eighty-seven million, one hundred ninety-nine thousand, forty-nine".