381807467731 has 2 divisors, whose sum is σ = 381807467732. Its totient is φ = 381807467730.

The previous prime is 381807467729. The next prime is 381807467749. The reversal of 381807467731 is 137764708183.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 381807467731 - 2¹ = 381807467729 is a prime.

It is a super-2 number, since 2×381807467731² (a number of 24 digits) contains 22 as substring.

Together with 381807467729, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (381807467761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190903733865 + 190903733866.

It is an arithmetic number, because the mean of its divisors is an integer number (190903733866).

Almost surely, 2^381807467731 is an apocalyptic number.

381807467731 is a deficient number, since it is larger than the sum of its proper divisors (1).

381807467731 is an equidigital number, since it uses as much as digits as its factorization.

381807467731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4741632, while the sum is 55.

The spelling of 381807467731 in words is "three hundred eighty-one billion, eight hundred seven million, four hundred sixty-seven thousand, seven hundred thirty-one".