99987449 has 2 divisors, whose sum is σ = 99987450. Its totient is φ = 99987448.

The previous prime is 99987373. The next prime is 99987457. The reversal of 99987449 is 94478999.

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., 93702400 + 6285049 = 9680^2 + 2507^2 .

It is a cyclic number.

It is not a de Polignac number, because 99987449 - 2¹² = 99983353 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (99983449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49993724 + 49993725.

It is an arithmetic number, because the mean of its divisors is an integer number (49993725).

Almost surely, 2^99987449 is an apocalyptic number.

It is an amenable number.

99987449 is a deficient number, since it is larger than the sum of its proper divisors (1).

99987449 is an equidigital number, since it uses as much as digits as its factorization.

99987449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5878656, while the sum is 59.

The square root of 99987449 is about 9999.3724303078. The cubic root of 99987449 is about 464.1394636883.

The spelling of 99987449 in words is "ninety-nine million, nine hundred eighty-seven thousand, four hundred forty-nine".