1340958517 has 4 divisors (see below), whose sum is σ = 1354235436. Its totient is φ = 1327681600.

The previous prime is 1340958511. The next prime is 1340958527. The reversal of 1340958517 is 7158590431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7158590431 = 26399 ⋅271169.

It can be written as a sum of positive squares in 2 ways, for example, as 541539441 + 799419076 = 23271^2 + 28274^2 .

It is a cyclic number.

It is not a de Polignac number, because 1340958517 - 2¹¹ = 1340956469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340958511) 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, 6638308 + ... + 6638509.

It is an arithmetic number, because the mean of its divisors is an integer number (338558859).

Almost surely, 2^1340958517 is an apocalyptic number.

It is an amenable number.

1340958517 is a deficient number, since it is larger than the sum of its proper divisors (13276919).

1340958517 is a wasteful number, since it uses less digits than its factorization.

1340958517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13276918.

The product of its (nonzero) digits is 151200, while the sum is 43.

The square root of 1340958517 is about 36619.1004395247. The cubic root of 1340958517 is about 1102.7365794065.

The spelling of 1340958517 in words is "one billion, three hundred forty million, nine hundred fifty-eight thousand, five hundred seventeen".