87519701 has 2 divisors, whose sum is σ = 87519702. Its totient is φ = 87519700.

The previous prime is 87519683. The next prime is 87519703. The reversal of 87519701 is 10791578.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85562500 + 1957201 = 9250^2 + 1399^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87519701 is a prime.

Together with 87519703, 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 (87519703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43759850 + 43759851.

It is an arithmetic number, because the mean of its divisors is an integer number (43759851).

Almost surely, 2^87519701 is an apocalyptic number.

It is an amenable number.

87519701 is a deficient number, since it is larger than the sum of its proper divisors (1).

87519701 is an equidigital number, since it uses as much as digits as its factorization.

87519701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17640, while the sum is 38.

The square root of 87519701 is about 9355.1964704115. The cubic root of 87519701 is about 443.9853176028.

The spelling of 87519701 in words is "eighty-seven million, five hundred nineteen thousand, seven hundred one".