1990301849387 has 2 divisors, whose sum is σ = 1990301849388. Its totient is φ = 1990301849386.

The previous prime is 1990301849383. The next prime is 1990301849479. The reversal of 1990301849387 is 7839481030991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1990301849387 - 2² = 1990301849383 is a prime.

It is a super-2 number, since 2×1990301849387² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1990301849383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 995150924693 + 995150924694.

It is an arithmetic number, because the mean of its divisors is an integer number (995150924694).

Almost surely, 2^{1990301849387} is an apocalyptic number.

1990301849387 is a deficient number, since it is larger than the sum of its proper divisors (1).

1990301849387 is an equidigital number, since it uses as much as digits as its factorization.

1990301849387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11757312, while the sum is 62.

The spelling of 1990301849387 in words is "one trillion, nine hundred ninety billion, three hundred one million, eight hundred forty-nine thousand, three hundred eighty-seven".