99999774 has 48 divisors (see below), whose sum is σ = 260657280. Its totient is φ = 27066960.

The previous prime is 99999773. The next prime is 99999787. The reversal of 99999774 is 47799999.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99999773) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18492 + ... + 23279.

It is an arithmetic number, because the mean of its divisors is an integer number (5430360).

Almost surely, 2^99999774 is an apocalyptic number.

99999774 is an abundant number, since it is smaller than the sum of its proper divisors (160657506).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99999774 is a wasteful number, since it uses less digits than its factorization.

99999774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41805 (or 41802 counting only the distinct ones).

The product of its digits is 11573604, while the sum is 63.

The square root of 99999774 is about 9999.9886999936. The cubic root of 99999774 is about 464.1585336947.

The spelling of 99999774 in words is "ninety-nine million, nine hundred ninety-nine thousand, seven hundred seventy-four".