87137693 has 2 divisors, whose sum is σ = 87137694. Its totient is φ = 87137692.

The previous prime is 87137641. The next prime is 87137717. The reversal of 87137693 is 39673178.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75290329 + 11847364 = 8677^2 + 3442^2 .

It is a cyclic number.

It is not a de Polignac number, because 87137693 - 2⁸ = 87137437 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87137893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43568846 + 43568847.

It is an arithmetic number, because the mean of its divisors is an integer number (43568847).

Almost surely, 2^87137693 is an apocalyptic number.

It is an amenable number.

87137693 is a deficient number, since it is larger than the sum of its proper divisors (1).

87137693 is an equidigital number, since it uses as much as digits as its factorization.

87137693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 190512, while the sum is 44.

The square root of 87137693 is about 9334.7572544764. The cubic root of 87137693 is about 443.3384030299.

The spelling of 87137693 in words is "eighty-seven million, one hundred thirty-seven thousand, six hundred ninety-three".