87828649 has 2 divisors, whose sum is σ = 87828650. Its totient is φ = 87828648.

The previous prime is 87828641. The next prime is 87828731. The reversal of 87828649 is 94682878.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86490000 + 1338649 = 9300^2 + 1157^2 .

It is a cyclic number.

It is not a de Polignac number, because 87828649 - 2³ = 87828641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 87828596 and 87828605.

It is not a weakly prime, because it can be changed into another prime (87828641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43914324 + 43914325.

It is an arithmetic number, because the mean of its divisors is an integer number (43914325).

Almost surely, 2^87828649 is an apocalyptic number.

It is an amenable number.

87828649 is a deficient number, since it is larger than the sum of its proper divisors (1).

87828649 is an equidigital number, since it uses as much as digits as its factorization.

87828649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1548288, while the sum is 52.

The square root of 87828649 is about 9371.6940304301. The cubic root of 87828649 is about 444.5071326413.

The spelling of 87828649 in words is "eighty-seven million, eight hundred twenty-eight thousand, six hundred forty-nine".