2124963691 has 4 divisors (see below), whose sum is σ = 2125061512. Its totient is φ = 2124865872.

The previous prime is 2124963689. The next prime is 2124963713. The reversal of 2124963691 is 1963694212.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2124963691 - 2¹ = 2124963689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2124963991) 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, 66 + ... + 65191.

It is an arithmetic number, because the mean of its divisors is an integer number (531265378).

Almost surely, 2^2124963691 is an apocalyptic number.

2124963691 is a deficient number, since it is larger than the sum of its proper divisors (97821).

2124963691 is an equidigital number, since it uses as much as digits as its factorization.

2124963691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97820.

The product of its digits is 139968, while the sum is 43.

The square root of 2124963691 is about 46097.3284583825. The cubic root of 2124963691 is about 1285.6334728824.

The spelling of 2124963691 in words is "two billion, one hundred twenty-four million, nine hundred sixty-three thousand, six hundred ninety-one".