381319450969 has 2 divisors, whose sum is σ = 381319450970. Its totient is φ = 381319450968.

The previous prime is 381319450961. The next prime is 381319451011. The reversal of 381319450969 is 969054913183.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 285861315600 + 95458135369 = 534660^2 + 308963^2 .

It is a cyclic number.

It is not a de Polignac number, because 381319450969 - 2³ = 381319450961 is a prime.

It is a super-2 number, since 2×381319450969² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (381319450961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190659725484 + 190659725485.

It is an arithmetic number, because the mean of its divisors is an integer number (190659725485).

Almost surely, 2^381319450969 is an apocalyptic number.

It is an amenable number.

381319450969 is a deficient number, since it is larger than the sum of its proper divisors (1).

381319450969 is an equidigital number, since it uses as much as digits as its factorization.

381319450969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6298560, while the sum is 58.

The spelling of 381319450969 in words is "three hundred eighty-one billion, three hundred nineteen million, four hundred fifty thousand, nine hundred sixty-nine".