98890891 has 4 divisors (see below), whose sum is σ = 107880984. Its totient is φ = 89900800.

The previous prime is 98890871. The next prime is 98890901. The reversal of 98890891 is 19809889.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 98890891 - 2¹³ = 98882699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (98890871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4495030 + ... + 4495051.

It is an arithmetic number, because the mean of its divisors is an integer number (26970246).

Almost surely, 2^98890891 is an apocalyptic number.

98890891 is the 5316-th centered heptagonal number.

98890891 is a deficient number, since it is larger than the sum of its proper divisors (8990093).

98890891 is a wasteful number, since it uses less digits than its factorization.

98890891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8990092.

The product of its (nonzero) digits is 373248, while the sum is 52.

The square root of 98890891 is about 9944.3899259834. The cubic root of 98890891 is about 462.4364905246.

The spelling of 98890891 in words is "ninety-eight million, eight hundred ninety thousand, eight hundred ninety-one".