93791389 has 4 divisors (see below), whose sum is σ = 94091356. Its totient is φ = 93491424.

The previous prime is 93791387. The next prime is 93791413. The reversal of 93791389 is 98319739.

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 21252100 + 72539289 = 4610^2 + 8517^2 .

It is a cyclic number.

It is not a de Polignac number, because 93791389 - 2¹ = 93791387 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 (93791381) 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, 149514 + ... + 150139.

It is an arithmetic number, because the mean of its divisors is an integer number (23522839).

Almost surely, 2^93791389 is an apocalyptic number.

It is an amenable number.

93791389 is a deficient number, since it is larger than the sum of its proper divisors (299967).

93791389 is a wasteful number, since it uses less digits than its factorization.

93791389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299966.

The product of its digits is 367416, while the sum is 49.

The square root of 93791389 is about 9684.5954484429. The cubic root of 93791389 is about 454.3469906428.

The spelling of 93791389 in words is "ninety-three million, seven hundred ninety-one thousand, three hundred eighty-nine".