1005364861 has 2 divisors, whose sum is σ = 1005364862. Its totient is φ = 1005364860.

The previous prime is 1005364739. The next prime is 1005364873. The reversal of 1005364861 is 1684635001.

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., 1003939225 + 1425636 = 31685^2 + 1194^2 .

It is a cyclic number.

It is not a de Polignac number, because 1005364861 - 2¹³ = 1005356669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1005364961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 502682430 + 502682431.

It is an arithmetic number, because the mean of its divisors is an integer number (502682431).

Almost surely, 2^1005364861 is an apocalyptic number.

It is an amenable number.

1005364861 is a deficient number, since it is larger than the sum of its proper divisors (1).

1005364861 is an equidigital number, since it uses as much as digits as its factorization.

1005364861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 1005364861 is about 31707.4890365037. The cubic root of 1005364861 is about 1001.7850985271.

Adding to 1005364861 its reverse (1684635001), we get a palindrome (2689999862).

The spelling of 1005364861 in words is "one billion, five million, three hundred sixty-four thousand, eight hundred sixty-one".