2920785457 has 2 divisors, whose sum is σ = 2920785458. Its totient is φ = 2920785456.

The previous prime is 2920785451. The next prime is 2920785493. The reversal of 2920785457 is 7545870292.

2920785457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2202331041 + 718454416 = 46929^2 + 26804^2 .

It is a cyclic number.

It is not a de Polignac number, because 2920785457 - 2¹⁵ = 2920752689 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2920785457.

It is not a weakly prime, because it can be changed into another prime (2920785451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1460392728 + 1460392729.

It is an arithmetic number, because the mean of its divisors is an integer number (1460392729).

Almost surely, 2^2920785457 is an apocalyptic number.

It is an amenable number.

2920785457 is a deficient number, since it is larger than the sum of its proper divisors (1).

2920785457 is an equidigital number, since it uses as much as digits as its factorization.

2920785457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1411200, while the sum is 49.

The square root of 2920785457 is about 54044.2916227052. The cubic root of 2920785457 is about 1429.4420463338.

The spelling of 2920785457 in words is "two billion, nine hundred twenty million, seven hundred eighty-five thousand, four hundred fifty-seven".