2920938221 has 2 divisors, whose sum is σ = 2920938222. Its totient is φ = 2920938220.

The previous prime is 2920938217. The next prime is 2920938301. The reversal of 2920938221 is 1228390292.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2518935721 + 402002500 = 50189^2 + 20050^2 .

It is a cyclic number.

It is not a de Polignac number, because 2920938221 - 2² = 2920938217 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2920938211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1460469110 + 1460469111.

It is an arithmetic number, because the mean of its divisors is an integer number (1460469111).

Almost surely, 2^2920938221 is an apocalyptic number.

It is an amenable number.

2920938221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2920938221 is an equidigital number, since it uses as much as digits as its factorization.

2920938221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 2920938221 is about 54045.7049264787. The cubic root of 2920938221 is about 1429.4669669680.

The spelling of 2920938221 in words is "two billion, nine hundred twenty million, nine hundred thirty-eight thousand, two hundred twenty-one".