93520821 has 4 divisors (see below), whose sum is σ = 124694432. Its totient is φ = 62347212.

The previous prime is 93520799. The next prime is 93520837. The reversal of 93520821 is 12802539.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 93520821 - 2⁵ = 93520789 is a prime.

It is a super-2 number, since 2×93520821² = 17492287921028082, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (93520871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15586801 + ... + 15586806.

It is an arithmetic number, because the mean of its divisors is an integer number (31173608).

Almost surely, 2^93520821 is an apocalyptic number.

It is an amenable number.

93520821 is a deficient number, since it is larger than the sum of its proper divisors (31173611).

93520821 is a wasteful number, since it uses less digits than its factorization.

93520821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31173610.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 93520821 is about 9670.6163712558. The cubic root of 93520821 is about 453.9096720423.

The spelling of 93520821 in words is "ninety-three million, five hundred twenty thousand, eight hundred twenty-one".