98505091 has 4 divisors (see below), whose sum is σ = 100600992. Its totient is φ = 96409192.

The previous prime is 98505079. The next prime is 98505107. The reversal of 98505091 is 19050589.

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 98505091 - 2⁷ = 98504963 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 98505091.

It is not an unprimeable number, because it can be changed into a prime (98505041) 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, 1047880 + ... + 1047973.

It is an arithmetic number, because the mean of its divisors is an integer number (25150248).

Almost surely, 2^98505091 is an apocalyptic number.

98505091 is a deficient number, since it is larger than the sum of its proper divisors (2095901).

98505091 is a wasteful number, since it uses less digits than its factorization.

98505091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2095900.

The product of its (nonzero) digits is 16200, while the sum is 37.

The square root of 98505091 is about 9924.9730982003. The cubic root of 98505091 is about 461.8343436997.

It can be divided in two parts, 9850 and 5091, that added together give a palindrome (14941).

The spelling of 98505091 in words is "ninety-eight million, five hundred five thousand, ninety-one".