2078661523 has 2 divisors, whose sum is σ = 2078661524. Its totient is φ = 2078661522.

The previous prime is 2078661521. The next prime is 2078661551. The reversal of 2078661523 is 3251668702.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2078661523 - 2¹ = 2078661521 is a prime.

Together with 2078661521, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2078661521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1039330761 + 1039330762.

It is an arithmetic number, because the mean of its divisors is an integer number (1039330762).

Almost surely, 2^2078661523 is an apocalyptic number.

2078661523 is a deficient number, since it is larger than the sum of its proper divisors (1).

2078661523 is an equidigital number, since it uses as much as digits as its factorization.

2078661523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 2078661523 is about 45592.3406176959. The cubic root of 2078661523 is about 1276.2269921984.

The spelling of 2078661523 in words is "two billion, seventy-eight million, six hundred sixty-one thousand, five hundred twenty-three".