1942398959609 has 2 divisors, whose sum is σ = 1942398959610. Its totient is φ = 1942398959608.

The previous prime is 1942398959573. The next prime is 1942398959653. The reversal of 1942398959609 is 9069598932491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1803863886400 + 138535073209 = 1343080^2 + 372203^2 .

It is a cyclic number.

It is not a de Polignac number, because 1942398959609 - 2⁸ = 1942398959353 is a prime.

It is a super-2 number, since 2×1942398959609² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1942398959689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 971199479804 + 971199479805.

It is an arithmetic number, because the mean of its divisors is an integer number (971199479805).

Almost surely, 2^{1942398959609} is an apocalyptic number.

It is an amenable number.

1942398959609 is a deficient number, since it is larger than the sum of its proper divisors (1).

1942398959609 is an equidigital number, since it uses as much as digits as its factorization.

1942398959609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 340122240, while the sum is 74.

The spelling of 1942398959609 in words is "one trillion, nine hundred forty-two billion, three hundred ninety-eight million, nine hundred fifty-nine thousand, six hundred nine".