93998971387 has 4 divisors (see below), whose sum is σ = 94739120896. Its totient is φ = 93258821880.

The previous prime is 93998971351. The next prime is 93998971411. The reversal of 93998971387 is 78317989939.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78317989939 = 7 ⋅11188284277.

It is a cyclic number.

It is not a de Polignac number, because 93998971387 - 2⁷ = 93998971259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (93998971337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 370074564 + ... + 370074817.

It is an arithmetic number, because the mean of its divisors is an integer number (23684780224).

Almost surely, 2^93998971387 is an apocalyptic number.

93998971387 is a deficient number, since it is larger than the sum of its proper divisors (740149509).

93998971387 is a wasteful number, since it uses less digits than its factorization.

93998971387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 740149508.

The product of its digits is 185177664, while the sum is 73.

The spelling of 93998971387 in words is "ninety-three billion, nine hundred ninety-eight million, nine hundred seventy-one thousand, three hundred eighty-seven".