2127981097 has 4 divisors (see below), whose sum is σ = 2321433936. Its totient is φ = 1934528260.

The previous prime is 2127981061. The next prime is 2127981101. The reversal of 2127981097 is 7901897212.

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-2127981097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2127981007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96726403 + ... + 96726424.

It is an arithmetic number, because the mean of its divisors is an integer number (580358484).

Almost surely, 2^2127981097 is an apocalyptic number.

It is an amenable number.

2127981097 is a deficient number, since it is larger than the sum of its proper divisors (193452839).

2127981097 is a wasteful number, since it uses less digits than its factorization.

2127981097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193452838.

The product of its (nonzero) digits is 127008, while the sum is 46.

The square root of 2127981097 is about 46130.0454909813. The cubic root of 2127981097 is about 1286.2417096965.

The spelling of 2127981097 in words is "two billion, one hundred twenty-seven million, nine hundred eighty-one thousand, ninety-seven".