2940397961 has 2 divisors, whose sum is σ = 2940397962. Its totient is φ = 2940397960.

The previous prime is 2940397949. The next prime is 2940397963. The reversal of 2940397961 is 1697930492.

2940397961 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2478147961 + 462250000 = 49781^2 + 21500^2 .

It is a cyclic number.

It is not a de Polignac number, because 2940397961 - 2¹⁰ = 2940396937 is a prime.

Together with 2940397963, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2940397963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1470198980 + 1470198981.

It is an arithmetic number, because the mean of its divisors is an integer number (1470198981).

Almost surely, 2^2940397961 is an apocalyptic number.

It is an amenable number.

2940397961 is a deficient number, since it is larger than the sum of its proper divisors (1).

2940397961 is an equidigital number, since it uses as much as digits as its factorization.

2940397961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 734832, while the sum is 50.

The square root of 2940397961 is about 54225.4364758828. The cubic root of 2940397961 is about 1432.6343863846.

The spelling of 2940397961 in words is "two billion, nine hundred forty million, three hundred ninety-seven thousand, nine hundred sixty-one".