99911782 has 4 divisors (see below), whose sum is σ = 149867676. Its totient is φ = 49955890.

The previous prime is 99911767. The next prime is 99911783. The reversal of 99911782 is 28711999.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99911783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24977944 + ... + 24977947.

It is an arithmetic number, because the mean of its divisors is an integer number (37466919).

Almost surely, 2^99911782 is an apocalyptic number.

99911782 is a deficient number, since it is larger than the sum of its proper divisors (49955894).

99911782 is a wasteful number, since it uses less digits than its factorization.

99911782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49955893.

The product of its digits is 81648, while the sum is 46.

The square root of 99911782 is about 9995.5881267687. The cubic root of 99911782 is about 464.0223526439.

The spelling of 99911782 in words is "ninety-nine million, nine hundred eleven thousand, seven hundred eighty-two".