381405784997 has 2 divisors, whose sum is σ = 381405784998. Its totient is φ = 381405784996.

The previous prime is 381405784967. The next prime is 381405785081. The reversal of 381405784997 is 799487504183.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 363173764321 + 18232020676 = 602639^2 + 135026^2 .

It is a cyclic number.

It is not a de Polignac number, because 381405784997 - 2²² = 381401590693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381405784967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190702892498 + 190702892499.

It is an arithmetic number, because the mean of its divisors is an integer number (190702892499).

Almost surely, 2^381405784997 is an apocalyptic number.

It is an amenable number.

381405784997 is a deficient number, since it is larger than the sum of its proper divisors (1).

381405784997 is an equidigital number, since it uses as much as digits as its factorization.

381405784997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60963840, while the sum is 65.

The spelling of 381405784997 in words is "three hundred eighty-one billion, four hundred five million, seven hundred eighty-four thousand, nine hundred ninety-seven".