87239753 has 2 divisors, whose sum is σ = 87239754. Its totient is φ = 87239752.

The previous prime is 87239741. The next prime is 87239771. The reversal of 87239753 is 35793278.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80227849 + 7011904 = 8957^2 + 2648^2 .

It is a cyclic number.

It is not a de Polignac number, because 87239753 - 2⁸ = 87239497 is a prime.

It is a super-2 number, since 2×87239753² = 15221549007002018, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (87239783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43619876 + 43619877.

It is an arithmetic number, because the mean of its divisors is an integer number (43619877).

Almost surely, 2^87239753 is an apocalyptic number.

It is an amenable number.

87239753 is a deficient number, since it is larger than the sum of its proper divisors (1).

87239753 is an equidigital number, since it uses as much as digits as its factorization.

87239753 is an evil number, because the sum of its binary digits is even.

The product of its digits is 317520, while the sum is 44.

The square root of 87239753 is about 9340.2223206945. Note that the first 3 decimals coincide. The cubic root of 87239753 is about 443.5114221606.

The spelling of 87239753 in words is "eighty-seven million, two hundred thirty-nine thousand, seven hundred fifty-three".