9999057 has 4 divisors (see below), whose sum is σ = 13332080. Its totient is φ = 6666036.

The previous prime is 9999053. The next prime is 9999071. The reversal of 9999057 is 7509999.

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.

It is not a de Polignac number, because 9999057 - 2² = 9999053 is a prime.

It is a super-2 number, since 2×9999057² = 199962281778498, which contains 22 as substring.

It is a Duffinian number.

9999057 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 9998997 and 9999015.

It is not an unprimeable number, because it can be changed into a prime (9999053) 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, 1666507 + ... + 1666512.

It is an arithmetic number, because the mean of its divisors is an integer number (3333020).

Almost surely, 2^9999057 is an apocalyptic number.

It is an amenable number.

9999057 is a deficient number, since it is larger than the sum of its proper divisors (3333023).

9999057 is a wasteful number, since it uses less digits than its factorization.

9999057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3333022.

The product of its (nonzero) digits is 229635, while the sum is 48.

The square root of 9999057 is about 3162.1285552615. The cubic root of 9999057 is about 215.4366966839.

The spelling of 9999057 in words is "nine million, nine hundred ninety-nine thousand, fifty-seven".