895137721 has 2 divisors, whose sum is σ = 895137722. Its totient is φ = 895137720.

The previous prime is 895137697. The next prime is 895137731. The reversal of 895137721 is 127731598.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 700925625 + 194212096 = 26475^2 + 13936^2 .

It is a cyclic number.

It is not a de Polignac number, because 895137721 - 2⁵ = 895137689 is a prime.

It is not a weakly prime, because it can be changed into another prime (895137731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 447568860 + 447568861.

It is an arithmetic number, because the mean of its divisors is an integer number (447568861).

Almost surely, 2^895137721 is an apocalyptic number.

It is an amenable number.

895137721 is a deficient number, since it is larger than the sum of its proper divisors (1).

895137721 is an equidigital number, since it uses as much as digits as its factorization.

895137721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 105840, while the sum is 43.

The square root of 895137721 is about 29918.8522674250. The cubic root of 895137721 is about 963.7475482169.

The spelling of 895137721 in words is "eight hundred ninety-five million, one hundred thirty-seven thousand, seven hundred twenty-one".