99997782 has 16 divisors (see below), whose sum is σ = 200137392. Its totient is φ = 33308960.

The previous prime is 99997769. The next prime is 99997783. The reversal of 99997782 is 28779999.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99997783) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4732 + ... + 14912.

It is an arithmetic number, because the mean of its divisors is an integer number (12508587).

Almost surely, 2^99997782 is an apocalyptic number.

99997782 is an abundant number, since it is smaller than the sum of its proper divisors (100139610).

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

99997782 is a wasteful number, since it uses less digits than its factorization.

99997782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11823.

The product of its digits is 5143824, while the sum is 60.

The square root of 99997782 is about 9999.8890993851. The cubic root of 99997782 is about 464.1554516546.

The spelling of 99997782 in words is "ninety-nine million, nine hundred ninety-seven thousand, seven hundred eighty-two".