87529493 has 2 divisors, whose sum is σ = 87529494. Its totient is φ = 87529492.

The previous prime is 87529489. The next prime is 87529499. The reversal of 87529493 is 39492578.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66945124 + 20584369 = 8182^2 + 4537^2 .

It is a cyclic number.

It is not a de Polignac number, because 87529493 - 2² = 87529489 is a prime.

It is a super-2 number, since 2×87529493² = 15322824289674098, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87529499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43764746 + 43764747.

It is an arithmetic number, because the mean of its divisors is an integer number (43764747).

Almost surely, 2^87529493 is an apocalyptic number.

It is an amenable number.

87529493 is a deficient number, since it is larger than the sum of its proper divisors (1).

87529493 is an equidigital number, since it uses as much as digits as its factorization.

87529493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 47.

The square root of 87529493 is about 9355.7198012767. The cubic root of 87529493 is about 444.0018751781.

The spelling of 87529493 in words is "eighty-seven million, five hundred twenty-nine thousand, four hundred ninety-three".