1840293899387 has 2 divisors, whose sum is σ = 1840293899388. Its totient is φ = 1840293899386.

The previous prime is 1840293899351. The next prime is 1840293899393. The reversal of 1840293899387 is 7839983920481.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1840293899387 - 2⁸ = 1840293899131 is a prime.

It is a super-2 number, since 2×1840293899387² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1840293899387.

It is not a weakly prime, because it can be changed into another prime (1840293899317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 920146949693 + 920146949694.

It is an arithmetic number, because the mean of its divisors is an integer number (920146949694).

Almost surely, 2^{1840293899387} is an apocalyptic number.

1840293899387 is a deficient number, since it is larger than the sum of its proper divisors (1).

1840293899387 is an equidigital number, since it uses as much as digits as its factorization.

1840293899387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 188116992, while the sum is 71.

The spelling of 1840293899387 in words is "one trillion, eight hundred forty billion, two hundred ninety-three million, eight hundred ninety-nine thousand, three hundred eighty-seven".