87102749 has 2 divisors, whose sum is σ = 87102750. Its totient is φ = 87102748.

The previous prime is 87102739. The next prime is 87102751. The reversal of 87102749 is 94720178.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51222649 + 35880100 = 7157^2 + 5990^2 .

It is a cyclic number.

It is not a de Polignac number, because 87102749 - 2⁴ = 87102733 is a prime.

Together with 87102751, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87102739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43551374 + 43551375.

It is an arithmetic number, because the mean of its divisors is an integer number (43551375).

Almost surely, 2^87102749 is an apocalyptic number.

It is an amenable number.

87102749 is a deficient number, since it is larger than the sum of its proper divisors (1).

87102749 is an equidigital number, since it uses as much as digits as its factorization.

87102749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 87102749 is about 9332.8853523442. The cubic root of 87102749 is about 443.2791325124.

The spelling of 87102749 in words is "eighty-seven million, one hundred two thousand, seven hundred forty-nine".