2943949 has 2 divisors, whose sum is σ = 2943950. Its totient is φ = 2943948.

The previous prime is 2943947. The next prime is 2943961. The reversal of 2943949 is 9493492.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1841449 + 1102500 = 1357^2 + 1050^2 .

It is a cyclic number.

It is not a de Polignac number, because 2943949 - 2¹ = 2943947 is a prime.

Together with 2943947, it forms a pair of twin primes.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2943947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1471974 + 1471975.

It is an arithmetic number, because the mean of its divisors is an integer number (1471975).

2^2943949 is an apocalyptic number.

It is an amenable number.

2943949 is a deficient number, since it is larger than the sum of its proper divisors (1).

2943949 is an equidigital number, since it uses as much as digits as its factorization.

2943949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 40.

The square root of 2943949 is about 1715.7939853024. The cubic root of 2943949 is about 143.3210872297.

The spelling of 2943949 in words is "two million, nine hundred forty-three thousand, nine hundred forty-nine".