98891691 has 8 divisors (see below), whose sum is σ = 132481344. Its totient is φ = 65614920.

The previous prime is 98891687. The next prime is 98891717. The reversal of 98891691 is 19619889.

It is a happy number.

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

It is not a de Polignac number, because 98891691 - 2² = 98891687 is a prime.

It is not an unprimeable number, because it can be changed into a prime (98891641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77481 + ... + 78746.

It is an arithmetic number, because the mean of its divisors is an integer number (16560168).

Almost surely, 2^98891691 is an apocalyptic number.

98891691 is a deficient number, since it is larger than the sum of its proper divisors (33589653).

98891691 is a wasteful number, since it uses less digits than its factorization.

98891691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156441.

The product of its digits is 279936, while the sum is 51.

The square root of 98891691 is about 9944.4301495862. The cubic root of 98891691 is about 462.4377375158.

The spelling of 98891691 in words is "ninety-eight million, eight hundred ninety-one thousand, six hundred ninety-one".