99941521 has 8 divisors (see below), whose sum is σ = 105956424. Its totient is φ = 93941760.

The previous prime is 99941483. The next prime is 99941533. The reversal of 99941521 is 12514999.

It can be written as a sum of positive squares in 4 ways, for example, as 440896 + 99500625 = 664^2 + 9975^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 99941521 - 2¹¹ = 99939473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99941561) 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, 11641 + ... + 18313.

It is an arithmetic number, because the mean of its divisors is an integer number (13244553).

Almost surely, 2^99941521 is an apocalyptic number.

It is an amenable number.

99941521 is a deficient number, since it is larger than the sum of its proper divisors (6014903).

99941521 is a wasteful number, since it uses less digits than its factorization.

99941521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7571.

The product of its digits is 29160, while the sum is 40.

The square root of 99941521 is about 9997.0756224008. The cubic root of 99941521 is about 464.0683872274.

The spelling of 99941521 in words is "ninety-nine million, nine hundred forty-one thousand, five hundred twenty-one".