93621389 has 4 divisors (see below), whose sum is σ = 93839040. Its totient is φ = 93403740.

The previous prime is 93621371. The next prime is 93621401. The reversal of 93621389 is 98312639.

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, and also an emirpimes, since its reverse is a distinct semiprime: 98312639 = 29 ⋅3390091.

It is a cyclic number.

It is not a de Polignac number, because 93621389 - 2¹⁶ = 93555853 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (93621349) 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, 108179 + ... + 109040.

It is an arithmetic number, because the mean of its divisors is an integer number (23459760).

Almost surely, 2^93621389 is an apocalyptic number.

It is an amenable number.

93621389 is a deficient number, since it is larger than the sum of its proper divisors (217651).

93621389 is a wasteful number, since it uses less digits than its factorization.

93621389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217650.

The product of its digits is 69984, while the sum is 41.

The square root of 93621389 is about 9675.8146427058. The cubic root of 93621389 is about 454.0723183005.

The spelling of 93621389 in words is "ninety-three million, six hundred twenty-one thousand, three hundred eighty-nine".