2977921 has 2 divisors, whose sum is σ = 2977922. Its totient is φ = 2977920.

The previous prime is 2977913. The next prime is 2977937. The reversal of 2977921 is 1297792.

It is the 705-th star number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2686321 + 291600 = 1639^2 + 540^2 .

It is a cyclic number.

It is not a de Polignac number, because 2977921 - 2³ = 2977913 is a prime.

It is not a weakly prime, because it can be changed into another prime (2977901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1488960 + 1488961.

It is an arithmetic number, because the mean of its divisors is an integer number (1488961).

2^2977921 is an apocalyptic number.

It is an amenable number.

2977921 is a deficient number, since it is larger than the sum of its proper divisors (1).

2977921 is an equidigital number, since it uses as much as digits as its factorization.

2977921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15876, while the sum is 37.

The square root of 2977921 is about 1725.6653789191. The cubic root of 2977921 is about 143.8702696057.

The spelling of 2977921 in words is "two million, nine hundred seventy-seven thousand, nine hundred twenty-one".