1994368577 has 2 divisors, whose sum is σ = 1994368578. Its totient is φ = 1994368576.

The previous prime is 1994368567. The next prime is 1994368603. The reversal of 1994368577 is 7758634991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1564677136 + 429691441 = 39556^2 + 20729^2 .

It is a cyclic number.

It is not a de Polignac number, because 1994368577 - 2⁶ = 1994368513 is a prime.

It is not a weakly prime, because it can be changed into another prime (1994368507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 997184288 + 997184289.

It is an arithmetic number, because the mean of its divisors is an integer number (997184289).

Almost surely, 2^1994368577 is an apocalyptic number.

It is an amenable number.

1994368577 is a deficient number, since it is larger than the sum of its proper divisors (1).

1994368577 is an equidigital number, since it uses as much as digits as its factorization.

1994368577 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11430720, while the sum is 59.

The square root of 1994368577 is about 44658.3539441391. The cubic root of 1994368577 is about 1258.7374135428.

The spelling of 1994368577 in words is "one billion, nine hundred ninety-four million, three hundred sixty-eight thousand, five hundred seventy-seven".