99731098 has 4 divisors (see below), whose sum is σ = 149596650. Its totient is φ = 49865548.

The previous prime is 99731081. The next prime is 99731117. The reversal of 99731098 is 89013799.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 89013799 = 7 ⋅12716257.

It can be written as a sum of positive squares in only one way, i.e., 69006249 + 30724849 = 8307^2 + 5543^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24932773 + ... + 24932776.

Almost surely, 2^99731098 is an apocalyptic number.

99731098 is a deficient number, since it is larger than the sum of its proper divisors (49865552).

99731098 is a wasteful number, since it uses less digits than its factorization.

99731098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49865551.

The product of its (nonzero) digits is 122472, while the sum is 46.

The square root of 99731098 is about 9986.5458492914. The cubic root of 99731098 is about 463.7424657126.

The spelling of 99731098 in words is "ninety-nine million, seven hundred thirty-one thousand, ninety-eight".