2731979 has 2 divisors, whose sum is σ = 2731980. Its totient is φ = 2731978.

The previous prime is 2731961. The next prime is 2731987. The reversal of 2731979 is 9791372.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2731979 - 2²⁰ = 1683403 is a prime.

It is not a weakly prime, because it can be changed into another prime (2731909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1365989 + 1365990.

It is an arithmetic number, because the mean of its divisors is an integer number (1365990).

2^2731979 is an apocalyptic number.

2731979 is a deficient number, since it is larger than the sum of its proper divisors (1).

2731979 is an equidigital number, since it uses as much as digits as its factorization.

2731979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23814, while the sum is 38.

The square root of 2731979 is about 1652.8699283368. The cubic root of 2731979 is about 139.7952619585.

The spelling of 2731979 in words is "two million, seven hundred thirty-one thousand, nine hundred seventy-nine".