1345136623 has 4 divisors (see below), whose sum is σ = 1403620848. Its totient is φ = 1286652400.

The previous prime is 1345136587. The next prime is 1345136659. The reversal of 1345136623 is 3266315431.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1345136587) and next prime (1345136659).

It is a cyclic number.

It is not a de Polignac number, because 1345136623 - 2²⁵ = 1311582191 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 (1345136123) 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 in 3 ways as a sum of consecutive naturals, for example, 29242078 + ... + 29242123.

It is an arithmetic number, because the mean of its divisors is an integer number (350905212).

Almost surely, 2^1345136623 is an apocalyptic number.

1345136623 is a deficient number, since it is larger than the sum of its proper divisors (58484225).

1345136623 is an equidigital number, since it uses as much as digits as its factorization.

1345136623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58484224.

The product of its digits is 38880, while the sum is 34.

The square root of 1345136623 is about 36676.1042505880. The cubic root of 1345136623 is about 1103.8806797875.

The spelling of 1345136623 in words is "one billion, three hundred forty-five million, one hundred thirty-six thousand, six hundred twenty-three".