87137641 has 2 divisors, whose sum is σ = 87137642. Its totient is φ = 87137640.

The previous prime is 87137581. The next prime is 87137693. The reversal of 87137641 is 14673178.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85747600 + 1390041 = 9260^2 + 1179^2 .

It is a cyclic number.

It is not a de Polignac number, because 87137641 - 2¹⁹ = 86613353 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 87137641.

It is not a weakly prime, because it can be changed into another prime (87137441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43568820 + 43568821.

It is an arithmetic number, because the mean of its divisors is an integer number (43568821).

Almost surely, 2^87137641 is an apocalyptic number.

It is an amenable number.

87137641 is a deficient number, since it is larger than the sum of its proper divisors (1).

87137641 is an equidigital number, since it uses as much as digits as its factorization.

87137641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28224, while the sum is 37.

The square root of 87137641 is about 9334.7544691866. The cubic root of 87137641 is about 443.3383148415.

It can be divided in two parts, 87137 and 641, that added together give a palindrome (87778).

The spelling of 87137641 in words is "eighty-seven million, one hundred thirty-seven thousand, six hundred forty-one".