1340707531 has 2 divisors, whose sum is σ = 1340707532. Its totient is φ = 1340707530.

The previous prime is 1340707523. The next prime is 1340707547. The reversal of 1340707531 is 1357070431.

It is a weak prime.

It is an emirp because it is prime and its reverse (1357070431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1340707531 - 2³ = 1340707523 is a prime.

It is a super-2 number, since 2×1340707531² = 3594993367360231922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1340707493 and 1340707502.

It is not a weakly prime, because it can be changed into another prime (1340707231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670353765 + 670353766.

It is an arithmetic number, because the mean of its divisors is an integer number (670353766).

Almost surely, 2^1340707531 is an apocalyptic number.

1340707531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340707531 is an equidigital number, since it uses as much as digits as its factorization.

1340707531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8820, while the sum is 31.

The square root of 1340707531 is about 36615.6732971005. The cubic root of 1340707531 is about 1102.6677757090.

Adding to 1340707531 its reverse (1357070431), we get a palindrome (2697777962).

The spelling of 1340707531 in words is "one billion, three hundred forty million, seven hundred seven thousand, five hundred thirty-one".