2045665397 has 2 divisors, whose sum is σ = 2045665398. Its totient is φ = 2045665396.

The previous prime is 2045665339. The next prime is 2045665409. The reversal of 2045665397 is 7935665402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2043853681 + 1811716 = 45209^2 + 1346^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2045665397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2045665337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1022832698 + 1022832699.

It is an arithmetic number, because the mean of its divisors is an integer number (1022832699).

Almost surely, 2^2045665397 is an apocalyptic number.

It is an amenable number.

2045665397 is a deficient number, since it is larger than the sum of its proper divisors (1).

2045665397 is an equidigital number, since it uses as much as digits as its factorization.

2045665397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1360800, while the sum is 47.

The square root of 2045665397 is about 45229.0326781372. The cubic root of 2045665397 is about 1269.4381123634.

The spelling of 2045665397 in words is "two billion, forty-five million, six hundred sixty-five thousand, three hundred ninety-seven".