98699091 has 32 divisors (see below), whose sum is σ = 145117440. Its totient is φ = 59439744.

The previous prime is 98699087. The next prime is 98699123. The reversal of 98699091 is 19099689.

98699091 = T₁₃₈ + T₁₃₉ + ... + T₈₄₀.

It is not a de Polignac number, because 98699091 - 2² = 98699087 is a prime.

It is not an unprimeable number, because it can be changed into a prime (98699011) 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 in 31 ways as a sum of consecutive naturals, for example, 111336 + ... + 112218.

It is an arithmetic number, because the mean of its divisors is an integer number (4534920).

Almost surely, 2^98699091 is an apocalyptic number.

98699091 is a deficient number, since it is larger than the sum of its proper divisors (46418349).

98699091 is a wasteful number, since it uses less digits than its factorization.

98699091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 995.

The product of its (nonzero) digits is 314928, while the sum is 51.

The square root of 98699091 is about 9934.7416171735. The cubic root of 98699091 is about 462.1373301007.

The spelling of 98699091 in words is "ninety-eight million, six hundred ninety-nine thousand, ninety-one".