993212857 has 8 divisors (see below), whose sum is σ = 1222415936. Its totient is φ = 785838672.

The previous prime is 993212807. The next prime is 993212861. The reversal of 993212857 is 758212399.

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

It is a cyclic number.

It is not a de Polignac number, because 993212857 - 2⁷ = 993212729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (993212807) 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, 5457123 + ... + 5457304.

It is an arithmetic number, because the mean of its divisors is an integer number (152801992).

Almost surely, 2^993212857 is an apocalyptic number.

It is an amenable number.

993212857 is a deficient number, since it is larger than the sum of its proper divisors (229203079).

993212857 is a wasteful number, since it uses less digits than its factorization.

993212857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10914447.

The product of its digits is 272160, while the sum is 46.

The square root of 993212857 is about 31515.2797385649. The cubic root of 993212857 is about 997.7324812450.

The spelling of 993212857 in words is "nine hundred ninety-three million, two hundred twelve thousand, eight hundred fifty-seven".