1340306631 has 6 divisors (see below), whose sum is σ = 1935998480. Its totient is φ = 893537748.

The previous prime is 1340306621. The next prime is 1340306641. The reversal of 1340306631 is 1366030431.

It is an interprime number because it is at equal distance from previous prime (1340306621) and next prime (1340306641).

It is not a de Polignac number, because 1340306631 - 2⁹ = 1340306119 is a prime.

It is a super-2 number, since 2×1340306631² = 3592843730205140322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1340306595 and 1340306604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340306621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 74461471 + ... + 74461488.

Almost surely, 2^1340306631 is an apocalyptic number.

1340306631 is a deficient number, since it is larger than the sum of its proper divisors (595691849).

1340306631 is a wasteful number, since it uses less digits than its factorization.

1340306631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148922965 (or 148922962 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

The square root of 1340306631 is about 36610.1984561679. The cubic root of 1340306631 is about 1102.5578577315.

The spelling of 1340306631 in words is "one billion, three hundred forty million, three hundred six thousand, six hundred thirty-one".