1797486137 has 4 divisors (see below), whose sum is σ = 1797574116. Its totient is φ = 1797398160.

The previous prime is 1797486121. The next prime is 1797486151. The reversal of 1797486137 is 7316847971.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7316847971 = 113 ⋅64750867.

It can be written as a sum of positive squares in 2 ways, for example, as 939054736 + 858431401 = 30644^2 + 29299^2 .

It is a cyclic number.

It is not a de Polignac number, because 1797486137 - 2⁴ = 1797486121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1797486167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4403 + ... + 60119.

It is an arithmetic number, because the mean of its divisors is an integer number (449393529).

Almost surely, 2^1797486137 is an apocalyptic number.

It is an amenable number.

1797486137 is a deficient number, since it is larger than the sum of its proper divisors (87979).

1797486137 is an equidigital number, since it uses as much as digits as its factorization.

1797486137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87978.

The product of its digits is 1778112, while the sum is 53.

The square root of 1797486137 is about 42396.7703604885. The cubic root of 1797486137 is about 1215.8738455607.

The spelling of 1797486137 in words is "one billion, seven hundred ninety-seven million, four hundred eighty-six thousand, one hundred thirty-seven".