87272729 has 2 divisors, whose sum is σ = 87272730. Its totient is φ = 87272728.

The previous prime is 87272711. The next prime is 87272737. The reversal of 87272729 is 92727278.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86062729 + 1210000 = 9277^2 + 1100^2 .

It is a cyclic number.

It is not a de Polignac number, because 87272729 - 2¹⁶ = 87207193 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 87272729.

It is not a weakly prime, because it can be changed into another prime (87272789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43636364 + 43636365.

It is an arithmetic number, because the mean of its divisors is an integer number (43636365).

Almost surely, 2^87272729 is an apocalyptic number.

It is an amenable number.

87272729 is a deficient number, since it is larger than the sum of its proper divisors (1).

87272729 is an equidigital number, since it uses as much as digits as its factorization.

87272729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 197568, while the sum is 44.

The square root of 87272729 is about 9341.9874223850. The cubic root of 87272729 is about 443.5672964985.

The spelling of 87272729 in words is "eighty-seven million, two hundred seventy-two thousand, seven hundred twenty-nine".