99994551 has 8 divisors (see below), whose sum is σ = 133467264. Its totient is φ = 66592440.

The previous prime is 99994481. The next prime is 99994553. The reversal of 99994551 is 15549999.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 99994551 - 2¹⁰ = 99993527 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 99994494 and 99994503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99994553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14251 + ... + 20076.

It is an arithmetic number, because the mean of its divisors is an integer number (16683408).

Almost surely, 2^99994551 is an apocalyptic number.

99994551 is a deficient number, since it is larger than the sum of its proper divisors (33472713).

99994551 is a wasteful number, since it uses less digits than its factorization.

99994551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35301.

The product of its digits is 656100, while the sum is 51.

The square root of 99994551 is about 9999.7275462884. The cubic root of 99994551 is about 464.1504525356.

The spelling of 99994551 in words is "ninety-nine million, nine hundred ninety-four thousand, five hundred fifty-one".