87533137 has 2 divisors, whose sum is σ = 87533138. Its totient is φ = 87533136.

The previous prime is 87533113. The next prime is 87533143. The reversal of 87533137 is 73133578.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46457856 + 41075281 = 6816^2 + 6409^2 .

It is a cyclic number.

It is not a de Polignac number, because 87533137 - 2¹¹ = 87531089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 87533096 and 87533105.

It is not a weakly prime, because it can be changed into another prime (87533177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43766568 + 43766569.

It is an arithmetic number, because the mean of its divisors is an integer number (43766569).

Almost surely, 2^87533137 is an apocalyptic number.

It is an amenable number.

87533137 is a deficient number, since it is larger than the sum of its proper divisors (1).

87533137 is an equidigital number, since it uses as much as digits as its factorization.

87533137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52920, while the sum is 37.

The square root of 87533137 is about 9355.9145464246. The cubic root of 87533137 is about 444.0080366075.

The spelling of 87533137 in words is "eighty-seven million, five hundred thirty-three thousand, one hundred thirty-seven".