2905107021 has 6 divisors (see below), whose sum is σ = 4196265710. Its totient is φ = 1936738008.

The previous prime is 2905107017. The next prime is 2905107043. The reversal of 2905107021 is 1207015092.

It can be written as a sum of positive squares in only one way, i.e., 2496501225 + 408605796 = 49965^2 + 20214^2 .

It is not a de Polignac number, because 2905107021 - 2² = 2905107017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2905107091) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 161394826 + ... + 161394843.

Almost surely, 2^2905107021 is an apocalyptic number.

It is an amenable number.

2905107021 is a deficient number, since it is larger than the sum of its proper divisors (1291158689).

2905107021 is a wasteful number, since it uses less digits than its factorization.

2905107021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322789675 (or 322789672 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 2905107021 is about 53899.0447132414. The cubic root of 2905107021 is about 1426.8797633899.

The spelling of 2905107021 in words is "two billion, nine hundred five million, one hundred seven thousand, twenty-one".