992539857 has 4 divisors (see below), whose sum is σ = 1323386480. Its totient is φ = 661693236.

The previous prime is 992539853. The next prime is 992539871. The reversal of 992539857 is 758935299.

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: 758935299 = 3 ⋅252978433.

It is not a de Polignac number, because 992539857 - 2² = 992539853 is a prime.

It is a super-3 number, since 3×992539857³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 992539797 and 992539806.

It is not an unprimeable number, because it can be changed into a prime (992539853) 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, 165423307 + ... + 165423312.

It is an arithmetic number, because the mean of its divisors is an integer number (330846620).

Almost surely, 2^992539857 is an apocalyptic number.

It is an amenable number.

992539857 is a deficient number, since it is larger than the sum of its proper divisors (330846623).

992539857 is a wasteful number, since it uses less digits than its factorization.

992539857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330846622.

The product of its digits is 6123600, while the sum is 57.

The square root of 992539857 is about 31504.6005688058. The cubic root of 992539857 is about 997.5070761616.

The spelling of 992539857 in words is "nine hundred ninety-two million, five hundred thirty-nine thousand, eight hundred fifty-seven".