87373729 has 2 divisors, whose sum is σ = 87373730. Its totient is φ = 87373728.

The previous prime is 87373709. The next prime is 87373751. The reversal of 87373729 is 92737378.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78730129 + 8643600 = 8873^2 + 2940^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87373729 is a prime.

It is not a weakly prime, because it can be changed into another prime (87373709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43686864 + 43686865.

It is an arithmetic number, because the mean of its divisors is an integer number (43686865).

Almost surely, 2^87373729 is an apocalyptic number.

It is an amenable number.

87373729 is a deficient number, since it is larger than the sum of its proper divisors (1).

87373729 is an equidigital number, since it uses as much as digits as its factorization.

87373729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 444528, while the sum is 46.

The square root of 87373729 is about 9347.3915612860. The cubic root of 87373729 is about 443.7383427738.

It can be divided in two parts, 8 and 7373729, that added together give a palindrome (7373737).

The spelling of 87373729 in words is "eighty-seven million, three hundred seventy-three thousand, seven hundred twenty-nine".