2921879 has 2 divisors, whose sum is σ = 2921880. Its totient is φ = 2921878.

The previous prime is 2921873. The next prime is 2921881. The reversal of 2921879 is 9781292.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2921879 - 2⁸ = 2921623 is a prime.

Together with 2921881, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2921873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1460939 + 1460940.

It is an arithmetic number, because the mean of its divisors is an integer number (1460940).

2^2921879 is an apocalyptic number.

2921879 is a deficient number, since it is larger than the sum of its proper divisors (1).

2921879 is an equidigital number, since it uses as much as digits as its factorization.

2921879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 38.

The square root of 2921879 is about 1709.3504614326. The cubic root of 2921879 is about 142.9620418593.

The spelling of 2921879 in words is "two million, nine hundred twenty-one thousand, eight hundred seventy-nine".