1655122013 has 2 divisors, whose sum is σ = 1655122014. Its totient is φ = 1655122012.

The previous prime is 1655122009. The next prime is 1655122069. The reversal of 1655122013 is 3102215561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1440733849 + 214388164 = 37957^2 + 14642^2 .

It is an emirp because it is prime and its reverse (3102215561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1655122013 - 2² = 1655122009 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1655127013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 827561006 + 827561007.

It is an arithmetic number, because the mean of its divisors is an integer number (827561007).

Almost surely, 2^1655122013 is an apocalyptic number.

It is an amenable number.

1655122013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1655122013 is an equidigital number, since it uses as much as digits as its factorization.

1655122013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 1655122013 is about 40683.1907917754. The cubic root of 1655122013 is about 1182.8872161809.

Adding to 1655122013 its reverse (3102215561), we get a palindrome (4757337574).

The spelling of 1655122013 in words is "one billion, six hundred fifty-five million, one hundred twenty-two thousand, thirteen".