99949550 has 12 divisors (see below), whose sum is σ = 185906256. Its totient is φ = 39979800.

The previous prime is 99949547. The next prime is 99949601. The reversal of 99949550 is 5594999.

It is a Harshad number since it is a multiple of its sum of digits (50), and also a Moran number because the ratio is a prime number: 1998991 = 99949550 / (9 + 9 + 9 + 4 + 9 + 5 + 5 + 0).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 999446 + ... + 999545.

It is an arithmetic number, because the mean of its divisors is an integer number (15492188).

Almost surely, 2^99949550 is an apocalyptic number.

99949550 is a deficient number, since it is larger than the sum of its proper divisors (85956706).

99949550 is a wasteful number, since it uses less digits than its factorization.

99949550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1999003 (or 1998998 counting only the distinct ones).

The product of its (nonzero) digits is 656100, while the sum is 50.

The square root of 99949550 is about 9997.4771817694. The cubic root of 99949550 is about 464.0808141790.

99949550 divided by its sum of digits (50) gives a palindrome (1998991).

The spelling of 99949550 in words is "ninety-nine million, nine hundred forty-nine thousand, five hundred fifty".