8390054381 has 2 divisors, whose sum is σ = 8390054382. Its totient is φ = 8390054380.

The previous prime is 8390054369. The next prime is 8390054411. The reversal of 8390054381 is 1834500938.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7732388356 + 657666025 = 87934^2 + 25645^2 .

It is a cyclic number.

It is not a de Polignac number, because 8390054381 - 2³⁰ = 7316312557 is a prime.

It is a super-2 number, since 2×8390054381² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8390054681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4195027190 + 4195027191.

It is an arithmetic number, because the mean of its divisors is an integer number (4195027191).

Almost surely, 2^8390054381 is an apocalyptic number.

It is an amenable number.

8390054381 is a deficient number, since it is larger than the sum of its proper divisors (1).

8390054381 is an equidigital number, since it uses as much as digits as its factorization.

8390054381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 8390054381 is about 91597.2400293808. The cubic root of 8390054381 is about 2031.9901197317.

The spelling of 8390054381 in words is "eight billion, three hundred ninety million, fifty-four thousand, three hundred eighty-one".