99998770 has 8 divisors (see below), whose sum is σ = 179997804. Its totient is φ = 39999504.

The previous prime is 99998749. The next prime is 99998783. The reversal of 99998770 is 7789999.

It can be written as a sum of positive squares in 2 ways, for example, as 99980001 + 18769 = 9999^2 + 137^2 .

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

It is a nialpdrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4999929 + ... + 4999948.

Almost surely, 2^99998770 is an apocalyptic number.

99998770 is a deficient number, since it is larger than the sum of its proper divisors (79999034).

99998770 is a wasteful number, since it uses less digits than its factorization.

99998770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9999884.

The product of its (nonzero) digits is 2571912, while the sum is 58.

The square root of 99998770 is about 9999.9384998109. The cubic root of 99998770 is about 464.1569803021.

It can be divided in two parts, 9999 and 8770, that added together give a square (18769 = 137²).

The spelling of 99998770 in words is "ninety-nine million, nine hundred ninety-eight thousand, seven hundred seventy".