98171691 has 4 divisors (see below), whose sum is σ = 130895592. Its totient is φ = 65447792.

The previous prime is 98171681. The next prime is 98171737. The reversal of 98171691 is 19617189.

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

It is a cyclic number.

It is not a de Polignac number, because 98171691 - 2²⁶ = 31062827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (98171681) 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, 16361946 + ... + 16361951.

It is an arithmetic number, because the mean of its divisors is an integer number (32723898).

Almost surely, 2^98171691 is an apocalyptic number.

98171691 is a deficient number, since it is larger than the sum of its proper divisors (32723901).

98171691 is a wasteful number, since it uses less digits than its factorization.

98171691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32723900.

The product of its digits is 27216, while the sum is 42.

The square root of 98171691 is about 9908.1628468652. The cubic root of 98171691 is about 461.3127137647.

The spelling of 98171691 in words is "ninety-eight million, one hundred seventy-one thousand, six hundred ninety-one".