1345186639 has 2 divisors, whose sum is σ = 1345186640. Its totient is φ = 1345186638.

The previous prime is 1345186613. The next prime is 1345186657. The reversal of 1345186639 is 9366815431.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1345186639 - 2⁹ = 1345186127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1345186679) 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 as a sum of consecutive naturals, namely, 672593319 + 672593320.

It is an arithmetic number, because the mean of its divisors is an integer number (672593320).

Almost surely, 2^1345186639 is an apocalyptic number.

1345186639 is a deficient number, since it is larger than the sum of its proper divisors (1).

1345186639 is an equidigital number, since it uses as much as digits as its factorization.

1345186639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 466560, while the sum is 46.

The square root of 1345186639 is about 36676.7861051101. The cubic root of 1345186639 is about 1103.8943614242.

The spelling of 1345186639 in words is "one billion, three hundred forty-five million, one hundred eighty-six thousand, six hundred thirty-nine".