1204136403689 has 2 divisors, whose sum is σ = 1204136403690. Its totient is φ = 1204136403688.

The previous prime is 1204136403671. The next prime is 1204136403727. The reversal of 1204136403689 is 9863046314021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1000480057600 + 203656346089 = 1000240^2 + 451283^2 .

It is a cyclic number.

It is not a de Polignac number, because 1204136403689 - 2¹² = 1204136399593 is a prime.

It is not a weakly prime, because it can be changed into another prime (1204136403649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 602068201844 + 602068201845.

It is an arithmetic number, because the mean of its divisors is an integer number (602068201845).

Almost surely, 2^{1204136403689} is an apocalyptic number.

It is an amenable number.

1204136403689 is a deficient number, since it is larger than the sum of its proper divisors (1).

1204136403689 is an equidigital number, since it uses as much as digits as its factorization.

1204136403689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 746496, while the sum is 47.

The spelling of 1204136403689 in words is "one trillion, two hundred four billion, one hundred thirty-six million, four hundred three thousand, six hundred eighty-nine".