2134607981 has 4 divisors (see below), whose sum is σ = 2328663264. Its totient is φ = 1940552700.

The previous prime is 2134607963. The next prime is 2134607983. The reversal of 2134607981 is 1897064312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2134607981 is a prime.

It is a super-2 number, since 2×2134607981² = 9113102465097792722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2134607983) 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 in 3 ways as a sum of consecutive naturals, for example, 97027625 + ... + 97027646.

It is an arithmetic number, because the mean of its divisors is an integer number (582165816).

Almost surely, 2^2134607981 is an apocalyptic number.

It is an amenable number.

2134607981 is a deficient number, since it is larger than the sum of its proper divisors (194055283).

2134607981 is a wasteful number, since it uses less digits than its factorization.

2134607981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194055282.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 2134607981 is about 46201.8179404231. The cubic root of 2134607981 is about 1287.5755156763.

The spelling of 2134607981 in words is "two billion, one hundred thirty-four million, six hundred seven thousand, nine hundred eighty-one".