99988649 has 2 divisors, whose sum is σ = 99988650. Its totient is φ = 99988648.

The previous prime is 99988633. The next prime is 99988753. The reversal of 99988649 is 94688999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94381225 + 5607424 = 9715^2 + 2368^2 .

It is a cyclic number.

It is not a de Polignac number, because 99988649 - 2⁴ = 99988633 is a prime.

It is a super-3 number, since 3×99988649³ (a number of 25 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 99988591 and 99988600.

It is not a weakly prime, because it can be changed into another prime (99988619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49994324 + 49994325.

It is an arithmetic number, because the mean of its divisors is an integer number (49994325).

Almost surely, 2^99988649 is an apocalyptic number.

It is an amenable number.

99988649 is a deficient number, since it is larger than the sum of its proper divisors (1).

99988649 is an equidigital number, since it uses as much as digits as its factorization.

99988649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10077696, while the sum is 62.

The square root of 99988649 is about 9999.4324338934. The cubic root of 99988649 is about 464.1413204718.

The spelling of 99988649 in words is "ninety-nine million, nine hundred eighty-eight thousand, six hundred forty-nine".