93928991 has 8 divisors (see below), whose sum is σ = 103622064. Its totient is φ = 84588480.

The previous prime is 93928979. The next prime is 93929089. The reversal of 93928991 is 19982939.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-93928991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (93928091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87581 + ... + 88646.

It is an arithmetic number, because the mean of its divisors is an integer number (12952758).

Almost surely, 2^93928991 is an apocalyptic number.

93928991 is a deficient number, since it is larger than the sum of its proper divisors (9693073).

93928991 is a wasteful number, since it uses less digits than its factorization.

93928991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176281.

The product of its digits is 314928, while the sum is 50.

The square root of 93928991 is about 9691.6970134234. The cubic root of 93928991 is about 454.5690739496.

The spelling of 93928991 in words is "ninety-three million, nine hundred twenty-eight thousand, nine hundred ninety-one".