98645991 has 8 divisors (see below), whose sum is σ = 131582064. Its totient is φ = 65736960.

The previous prime is 98645969. The next prime is 98646001. The reversal of 98645991 is 19954689.

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

It is not a de Polignac number, because 98645991 - 2²³ = 90257383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98645941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4375 + ... + 14711.

It is an arithmetic number, because the mean of its divisors is an integer number (16447758).

Almost surely, 2^98645991 is an apocalyptic number.

98645991 is a deficient number, since it is larger than the sum of its proper divisors (32936073).

98645991 is a wasteful number, since it uses less digits than its factorization.

98645991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13521.

The product of its digits is 699840, while the sum is 51.

The square root of 98645991 is about 9932.0688177237. The cubic root of 98645991 is about 462.0544387791.

The spelling of 98645991 in words is "ninety-eight million, six hundred forty-five thousand, nine hundred ninety-one".