1655713123 has 2 divisors, whose sum is σ = 1655713124. Its totient is φ = 1655713122.

The previous prime is 1655713109. The next prime is 1655713141. The reversal of 1655713123 is 3213175561.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1655713123 is a prime.

It is not a weakly prime, because it can be changed into another prime (1655713183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 827856561 + 827856562.

It is an arithmetic number, because the mean of its divisors is an integer number (827856562).

Almost surely, 2^1655713123 is an apocalyptic number.

1655713123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1655713123 is an equidigital number, since it uses as much as digits as its factorization.

1655713123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18900, while the sum is 34.

The square root of 1655713123 is about 40690.4549372454. The cubic root of 1655713123 is about 1183.0280181347.

Adding to 1655713123 its reverse (3213175561), we get a palindrome (4868888684).

The spelling of 1655713123 in words is "one billion, six hundred fifty-five million, seven hundred thirteen thousand, one hundred twenty-three".