98000091 has 32 divisors (see below), whose sum is σ = 168222720. Its totient is φ = 55225152.

The previous prime is 98000069. The next prime is 98000101. The reversal of 98000091 is 19000089.

98000091 = T₃₄₆ + T₃₄₇ + ... + T₈₅₆.

It is not a de Polignac number, because 98000091 - 2⁵ = 98000059 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (98000051) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10246 + ... + 17348.

It is an arithmetic number, because the mean of its divisors is an integer number (5256960).

Almost surely, 2^98000091 is an apocalyptic number.

98000091 is a deficient number, since it is larger than the sum of its proper divisors (70222629).

98000091 is a wasteful number, since it uses less digits than its factorization.

98000091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7192 (or 7186 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The square root of 98000091 is about 9899.4995328047. The cubic root of 98000091 is about 461.0437719098.

The spelling of 98000091 in words is "ninety-eight million, ninety-one", and thus it is an aban number and an uban number.