1340635137 has 4 divisors (see below), whose sum is σ = 1787513520. Its totient is φ = 893756756.

The previous prime is 1340635081. The next prime is 1340635139. The reversal of 1340635137 is 7315360431.

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 a cyclic number.

It is not a de Polignac number, because 1340635137 - 2¹¹ = 1340633089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1340635098 and 1340635107.

It is not an unprimeable number, because it can be changed into a prime (1340635139) 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, 223439187 + ... + 223439192.

It is an arithmetic number, because the mean of its divisors is an integer number (446878380).

Almost surely, 2^1340635137 is an apocalyptic number.

It is an amenable number.

1340635137 is a deficient number, since it is larger than the sum of its proper divisors (446878383).

1340635137 is an equidigital number, since it uses as much as digits as its factorization.

1340635137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446878382.

The product of its (nonzero) digits is 22680, while the sum is 33.

The square root of 1340635137 is about 36614.6847180199. The cubic root of 1340635137 is about 1102.6479284850.

Adding to 1340635137 its reverse (7315360431), we get a palindrome (8655995568).

The spelling of 1340635137 in words is "one billion, three hundred forty million, six hundred thirty-five thousand, one hundred thirty-seven".