99897549 has 4 divisors (see below), whose sum is σ = 133196736. Its totient is φ = 66598364.

The previous prime is 99897517. The next prime is 99897583. The reversal of 99897549 is 94579899.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94579899 = 3 ⋅31526633.

It is a cyclic number.

It is not a de Polignac number, because 99897549 - 2⁵ = 99897517 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 99897492 and 99897501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99897509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16649589 + ... + 16649594.

It is an arithmetic number, because the mean of its divisors is an integer number (33299184).

Almost surely, 2^99897549 is an apocalyptic number.

It is an amenable number.

99897549 is a deficient number, since it is larger than the sum of its proper divisors (33299187).

99897549 is a wasteful number, since it uses less digits than its factorization.

99897549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33299186.

The product of its digits is 7348320, while the sum is 60.

The square root of 99897549 is about 9994.8761373016. The cubic root of 99897549 is about 464.0003173923. Note that the first 3 decimals are identical.

The spelling of 99897549 in words is "ninety-nine million, eight hundred ninety-seven thousand, five hundred forty-nine".