2043537961 has 2 divisors, whose sum is σ = 2043537962. Its totient is φ = 2043537960.

The previous prime is 2043537959. The next prime is 2043538039. The reversal of 2043537961 is 1697353402.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1932129936 + 111408025 = 43956^2 + 10555^2 .

It is a cyclic number.

It is not a de Polignac number, because 2043537961 - 2¹ = 2043537959 is a prime.

Together with 2043537959, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2043537901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1021768980 + 1021768981.

It is an arithmetic number, because the mean of its divisors is an integer number (1021768981).

Almost surely, 2^2043537961 is an apocalyptic number.

It is an amenable number.

2043537961 is a deficient number, since it is larger than the sum of its proper divisors (1).

2043537961 is an equidigital number, since it uses as much as digits as its factorization.

2043537961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 136080, while the sum is 40.

The square root of 2043537961 is about 45205.5080825335. The cubic root of 2043537961 is about 1268.9978994323.

The spelling of 2043537961 in words is "two billion, forty-three million, five hundred thirty-seven thousand, nine hundred sixty-one".