2157698039 has 16 divisors (see below), whose sum is σ = 2520939840. Its totient is φ = 1808559360.

The previous prime is 2157698029. The next prime is 2157698051. The reversal of 2157698039 is 9308967512.

It is a cyclic number.

It is not a de Polignac number, because 2157698039 - 2¹² = 2157693943 is a prime.

It is a super-3 number, since 3×2157698039³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2157698029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59267 + ... + 88475.

It is an arithmetic number, because the mean of its divisors is an integer number (157558740).

Almost surely, 2^2157698039 is an apocalyptic number.

2157698039 is a deficient number, since it is larger than the sum of its proper divisors (363241801).

2157698039 is a wasteful number, since it uses less digits than its factorization.

2157698039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29450.

The product of its (nonzero) digits is 816480, while the sum is 50.

The square root of 2157698039 is about 46451.0283955049. The cubic root of 2157698039 is about 1292.2014448091.

The spelling of 2157698039 in words is "two billion, one hundred fifty-seven million, six hundred ninety-eight thousand, thirty-nine".