2945836121 has 4 divisors (see below), whose sum is σ = 2955248052. Its totient is φ = 2936424192.

The previous prime is 2945836093. The next prime is 2945836129. The reversal of 2945836121 is 1216385492.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 324396121 + 2621440000 = 18011^2 + 51200^2 .

It is a cyclic number.

It is not a de Polignac number, because 2945836121 - 2¹⁰ = 2945835097 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2945836129) 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, 4705496 + ... + 4706121.

It is an arithmetic number, because the mean of its divisors is an integer number (738812013).

Almost surely, 2^2945836121 is an apocalyptic number.

It is an amenable number.

2945836121 is a deficient number, since it is larger than the sum of its proper divisors (9411931).

2945836121 is an equidigital number, since it uses as much as digits as its factorization.

2945836121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9411930.

The product of its digits is 103680, while the sum is 41.

The square root of 2945836121 is about 54275.5573071341. The cubic root of 2945836121 is about 1433.5170443392.

The spelling of 2945836121 in words is "two billion, nine hundred forty-five million, eight hundred thirty-six thousand, one hundred twenty-one".