8470381 has 2 divisors, whose sum is σ = 8470382. Its totient is φ = 8470380.

The previous prime is 8470351. The next prime is 8470393. The reversal of 8470381 is 1830748.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8462281 + 8100 = 2909^2 + 90^2 .

It is a cyclic number.

It is not a de Polignac number, because 8470381 - 2⁹ = 8469869 is a prime.

It is a super-2 number, since 2×8470381² = 143494708570322, which contains 22 as substring.

8470381 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8470351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4235190 + 4235191.

It is an arithmetic number, because the mean of its divisors is an integer number (4235191).

Almost surely, 2^8470381 is an apocalyptic number.

It is an amenable number.

8470381 is a deficient number, since it is larger than the sum of its proper divisors (1).

8470381 is an equidigital number, since it uses as much as digits as its factorization.

8470381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 8470381 is about 2910.3918980096. The cubic root of 8470381 is about 203.8454311008.

It can be divided in two parts, 8470 and 381, that multiplied together give a triangular number (3227070 = T₂₅₄₀).

The spelling of 8470381 in words is "eight million, four hundred seventy thousand, three hundred eighty-one".