8361557 has 2 divisors, whose sum is σ = 8361558. Its totient is φ = 8361556.

The previous prime is 8361491. The next prime is 8361589. The reversal of 8361557 is 7551638.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7349521 + 1012036 = 2711^2 + 1006^2 .

It is a cyclic number.

It is not a de Polignac number, because 8361557 - 2¹⁴ = 8345173 is a prime.

It is a Chen prime.

It is a d-powerful number, because it can be written as 8⁵ + 3¹² + 6⁴ + 1 + 5⁷ + 5⁹ + 7⁸ .

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8361257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4180778 + 4180779.

It is an arithmetic number, because the mean of its divisors is an integer number (4180779).

Almost surely, 2^8361557 is an apocalyptic number.

It is an amenable number.

8361557 is a deficient number, since it is larger than the sum of its proper divisors (1).

8361557 is an equidigital number, since it uses as much as digits as its factorization.

8361557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25200, while the sum is 35.

The square root of 8361557 is about 2891.6356962799. The cubic root of 8361557 is about 202.9686913301.

The spelling of 8361557 in words is "eight million, three hundred sixty-one thousand, five hundred fifty-seven".