2049651697 has 2 divisors, whose sum is σ = 2049651698. Its totient is φ = 2049651696.

The previous prime is 2049651689. The next prime is 2049651719. The reversal of 2049651697 is 7961569402.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2046748081 + 2903616 = 45241^2 + 1704^2 .

It is a cyclic number.

It is not a de Polignac number, because 2049651697 - 2³ = 2049651689 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2049651697.

It is not a weakly prime, because it can be changed into another prime (2049651677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1024825848 + 1024825849.

It is an arithmetic number, because the mean of its divisors is an integer number (1024825849).

Almost surely, 2^2049651697 is an apocalyptic number.

It is an amenable number.

2049651697 is a deficient number, since it is larger than the sum of its proper divisors (1).

2049651697 is an equidigital number, since it uses as much as digits as its factorization.

2049651697 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 816480, while the sum is 49.

The square root of 2049651697 is about 45273.0791641125. The cubic root of 2049651697 is about 1270.2621437909.

The spelling of 2049651697 in words is "two billion, forty-nine million, six hundred fifty-one thousand, six hundred ninety-seven".