9999157 has 8 divisors (see below), whose sum is σ = 11460800. Its totient is φ = 8545824.

The previous prime is 9999083. The next prime is 9999161. The reversal of 9999157 is 7519999.

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

It is not a de Polignac number, because 9999157 - 2¹¹ = 9997109 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9999157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9999167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 769 + ... + 4537.

It is an arithmetic number, because the mean of its divisors is an integer number (1432600).

Almost surely, 2^9999157 is an apocalyptic number.

It is an amenable number.

9999157 is a deficient number, since it is larger than the sum of its proper divisors (1461643).

9999157 is a wasteful number, since it uses less digits than its factorization.

9999157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4155.

The product of its digits is 229635, while the sum is 49.

The square root of 9999157 is about 3162.1443673558. The cubic root of 9999157 is about 215.4374148716.

The spelling of 9999157 in words is "nine million, nine hundred ninety-nine thousand, one hundred fifty-seven".