8361491 has 2 divisors, whose sum is σ = 8361492. Its totient is φ = 8361490.

The previous prime is 8361449. The next prime is 8361557. The reversal of 8361491 is 1941638.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8361491 - 2¹⁸ = 8099347 is a prime.

It is not a weakly prime, because it can be changed into another prime (8361191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4180745 + 4180746.

It is an arithmetic number, because the mean of its divisors is an integer number (4180746).

Almost surely, 2^8361491 is an apocalyptic number.

8361491 is a deficient number, since it is larger than the sum of its proper divisors (1).

8361491 is an equidigital number, since it uses as much as digits as its factorization.

8361491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 32.

The square root of 8361491 is about 2891.6242840314. The cubic root of 8361491 is about 202.9681573000.

The spelling of 8361491 in words is "eight million, three hundred sixty-one thousand, four hundred ninety-one".