911861 has 2 divisors, whose sum is σ = 911862. Its totient is φ = 911860.

The previous prime is 911851. The next prime is 911873. The reversal of 911861 is 168119.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 874225 + 37636 = 935^2 + 194^2 .

It is a cyclic number.

It is not a de Polignac number, because 911861 - 2¹⁸ = 649717 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 911861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (911831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 455930 + 455931.

It is an arithmetic number, because the mean of its divisors is an integer number (455931).

2⁹¹¹⁸⁶¹ is an apocalyptic number.

It is an amenable number.

911861 is a deficient number, since it is larger than the sum of its proper divisors (1).

911861 is an equidigital number, since it uses as much as digits as its factorization.

911861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432, while the sum is 26.

The square root of 911861 is about 954.9141322653. The cubic root of 911861 is about 96.9712246810.

The spelling of 911861 in words is "nine hundred eleven thousand, eight hundred sixty-one".