381359897 has 2 divisors, whose sum is σ = 381359898. Its totient is φ = 381359896.

The previous prime is 381359879. The next prime is 381359911. The reversal of 381359897 is 798953183.

It is a happy number.

Together with previous prime (381359879) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 209120521 + 172239376 = 14461^2 + 13124^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-381359897 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (381359807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190679948 + 190679949.

It is an arithmetic number, because the mean of its divisors is an integer number (190679949).

Almost surely, 2^381359897 is an apocalyptic number.

It is an amenable number.

381359897 is a deficient number, since it is larger than the sum of its proper divisors (1).

381359897 is an equidigital number, since it uses as much as digits as its factorization.

381359897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1632960, while the sum is 53.

The square root of 381359897 is about 19528.4381607951. The cubic root of 381359897 is about 725.1786461073.

The spelling of 381359897 in words is "three hundred eighty-one million, three hundred fifty-nine thousand, eight hundred ninety-seven".