98737991 has 8 divisors (see below), whose sum is σ = 107952384. Its totient is φ = 89563320.

The previous prime is 98737973. The next prime is 98737997. The reversal of 98737991 is 19973789.

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

It is not a de Polignac number, because 98737991 - 2¹⁸ = 98475847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98737997) 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, 4601 + ... + 14786.

It is an arithmetic number, because the mean of its divisors is an integer number (13494048).

Almost surely, 2^98737991 is an apocalyptic number.

98737991 is a deficient number, since it is larger than the sum of its proper divisors (9214393).

98737991 is a wasteful number, since it uses less digits than its factorization.

98737991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19861.

The product of its digits is 857304, while the sum is 53.

The square root of 98737991 is about 9936.6992004387. The cubic root of 98737991 is about 462.1980357625.

The spelling of 98737991 in words is "ninety-eight million, seven hundred thirty-seven thousand, nine hundred ninety-one".