17897249137 has 4 divisors (see below), whose sum is σ = 18950028516. Its totient is φ = 16844469760.

The previous prime is 17897249119. The next prime is 17897249323. The reversal of 17897249137 is 73194279871.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10829316096 + 7067933041 = 104064^2 + 84071^2 .

It is a cyclic number.

It is not a de Polignac number, because 17897249137 - 2¹⁵ = 17897216369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (17897249537) 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, 526389664 + ... + 526389697.

It is an arithmetic number, because the mean of its divisors is an integer number (4737507129).

Almost surely, 2^17897249137 is an apocalyptic number.

17897249137 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

17897249137 is a deficient number, since it is larger than the sum of its proper divisors (1052779379).

17897249137 is a wasteful number, since it uses less digits than its factorization.

17897249137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1052779378.

The product of its digits is 5334336, while the sum is 58.

The spelling of 17897249137 in words is "seventeen billion, eight hundred ninety-seven million, two hundred forty-nine thousand, one hundred thirty-seven".