2135199973 has 2 divisors, whose sum is σ = 2135199974. Its totient is φ = 2135199972.

The previous prime is 2135199961. The next prime is 2135200007. The reversal of 2135199973 is 3799915312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1889901729 + 245298244 = 43473^2 + 15662^2 .

It is a cyclic number.

It is not a de Polignac number, because 2135199973 - 2¹³ = 2135191781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2135194973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1067599986 + 1067599987.

It is an arithmetic number, because the mean of its divisors is an integer number (1067599987).

Almost surely, 2^2135199973 is an apocalyptic number.

It is an amenable number.

2135199973 is a deficient number, since it is larger than the sum of its proper divisors (1).

2135199973 is an equidigital number, since it uses as much as digits as its factorization.

2135199973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 459270, while the sum is 49.

The square root of 2135199973 is about 46208.2240840308. The cubic root of 2135199973 is about 1287.6945326822.

The spelling of 2135199973 in words is "two billion, one hundred thirty-five million, one hundred ninety-nine thousand, nine hundred seventy-three".