98811521 has 4 divisors (see below), whose sum is σ = 100431444. Its totient is φ = 97191600.

The previous prime is 98811509. The next prime is 98811527. The reversal of 98811521 is 12511889.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3534400 + 95277121 = 1880^2 + 9761^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-98811521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (98811527) 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, 809870 + ... + 809991.

It is an arithmetic number, because the mean of its divisors is an integer number (25107861).

Almost surely, 2^98811521 is an apocalyptic number.

It is an amenable number.

98811521 is a deficient number, since it is larger than the sum of its proper divisors (1619923).

98811521 is a wasteful number, since it uses less digits than its factorization.

98811521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1619922.

The product of its digits is 5760, while the sum is 35.

The square root of 98811521 is about 9940.3984326585. The cubic root of 98811521 is about 462.3127399691.

The spelling of 98811521 in words is "ninety-eight million, eight hundred eleven thousand, five hundred twenty-one".