99977722 has 8 divisors (see below), whose sum is σ = 161502516. Its totient is φ = 46143552.

The previous prime is 99977707. The next prime is 99977729. The reversal of 99977722 is 22777999.

It can be written as a sum of positive squares in 2 ways, for example, as 76055841 + 23921881 = 8721^2 + 4891^2 .

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

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 99977722.

It is not an unprimeable number, because it can be changed into a prime (99977729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1922623 + ... + 1922674.

Almost surely, 2^99977722 is an apocalyptic number.

99977722 is a deficient number, since it is larger than the sum of its proper divisors (61524794).

99977722 is a wasteful number, since it uses less digits than its factorization.

99977722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3845312.

The product of its digits is 1000188, while the sum is 52.

The square root of 99977722 is about 9998.8860379544. The cubic root of 99977722 is about 464.1244123627.

The spelling of 99977722 in words is "ninety-nine million, nine hundred seventy-seven thousand, seven hundred twenty-two".