87068749 has 2 divisors, whose sum is σ = 87068750. Its totient is φ = 87068748.

The previous prime is 87068717. The next prime is 87068803. The reversal of 87068749 is 94786078.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69006249 + 18062500 = 8307^2 + 4250^2 .

It is a cyclic number.

It is not a de Polignac number, because 87068749 - 2⁵ = 87068717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87062749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43534374 + 43534375.

It is an arithmetic number, because the mean of its divisors is an integer number (43534375).

Almost surely, 2^87068749 is an apocalyptic number.

It is an amenable number.

87068749 is a deficient number, since it is larger than the sum of its proper divisors (1).

87068749 is an equidigital number, since it uses as much as digits as its factorization.

87068749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 677376, while the sum is 49.

The square root of 87068749 is about 9331.0636585547. The cubic root of 87068749 is about 443.2214479497.

The spelling of 87068749 in words is "eighty-seven million, sixty-eight thousand, seven hundred forty-nine".