93406021 has 4 divisors (see below), whose sum is σ = 93460192. Its totient is φ = 93351852.

The previous prime is 93405997. The next prime is 93406037. The reversal of 93406021 is 12060439.

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 a cyclic number.

It is not a de Polignac number, because 93406021 - 2⁵ = 93405989 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 (93406091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24411 + ... + 27976.

It is an arithmetic number, because the mean of its divisors is an integer number (23365048).

Almost surely, 2^93406021 is an apocalyptic number.

It is an amenable number.

93406021 is a deficient number, since it is larger than the sum of its proper divisors (54171).

93406021 is a wasteful number, since it uses less digits than its factorization.

93406021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54170.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 93406021 is about 9664.6790427825. The cubic root of 93406021 is about 453.7238661218.

The spelling of 93406021 in words is "ninety-three million, four hundred six thousand, twenty-one".