2135456437 has 2 divisors, whose sum is σ = 2135456438. Its totient is φ = 2135456436.

The previous prime is 2135456429. The next prime is 2135456473. The reversal of 2135456437 is 7346545312.

It is a happy number.

Together with next prime (2135456473) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1256986116 + 878470321 = 35454^2 + 29639^2 .

It is a cyclic number.

It is not a de Polignac number, because 2135456437 - 2³ = 2135456429 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2135456437.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2135456537) 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 as a sum of consecutive naturals, namely, 1067728218 + 1067728219.

It is an arithmetic number, because the mean of its divisors is an integer number (1067728219).

Almost surely, 2^2135456437 is an apocalyptic number.

It is an amenable number.

2135456437 is a deficient number, since it is larger than the sum of its proper divisors (1).

2135456437 is an equidigital number, since it uses as much as digits as its factorization.

2135456437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 302400, while the sum is 40.

The square root of 2135456437 is about 46210.9990911255. Note that the first 3 decimals coincide. The cubic root of 2135456437 is about 1287.7460866464.

The spelling of 2135456437 in words is "two billion, one hundred thirty-five million, four hundred fifty-six thousand, four hundred thirty-seven".