2920657 has 4 divisors (see below), whose sum is σ = 2960740. Its totient is φ = 2880576.

The previous prime is 2920649. The next prime is 2920691. The reversal of 2920657 is 7560292.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2531281 + 389376 = 1591^2 + 624^2 .

It is a cyclic number.

It is not a de Polignac number, because 2920657 - 2³ = 2920649 is a prime.

It is a Duffinian number.

2920657 is a modest number, since divided by 657 gives 292 as remainder.

It is not an unprimeable number, because it can be changed into a prime (2920637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19932 + ... + 20077.

It is an arithmetic number, because the mean of its divisors is an integer number (740185).

2^2920657 is an apocalyptic number.

It is an amenable number.

2920657 is a deficient number, since it is larger than the sum of its proper divisors (40083).

2920657 is an equidigital number, since it uses as much as digits as its factorization.

2920657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40082.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 2920657 is about 1708.9929783355. The cubic root of 2920657 is about 142.9421090267.

The spelling of 2920657 in words is "two million, nine hundred twenty thousand, six hundred fifty-seven".