87011501 has 2 divisors, whose sum is σ = 87011502. Its totient is φ = 87011500.

The previous prime is 87011467. The next prime is 87011521. The reversal of 87011501 is 10511078.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55145476 + 31866025 = 7426^2 + 5645^2 .

It is a cyclic number.

It is not a de Polignac number, because 87011501 - 2²² = 82817197 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87011521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43505750 + 43505751.

It is an arithmetic number, because the mean of its divisors is an integer number (43505751).

Almost surely, 2^87011501 is an apocalyptic number.

It is an amenable number.

87011501 is a deficient number, since it is larger than the sum of its proper divisors (1).

87011501 is an equidigital number, since it uses as much as digits as its factorization.

87011501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 280, while the sum is 23.

The square root of 87011501 is about 9327.9955510281. The cubic root of 87011501 is about 443.1242867798.

Adding to 87011501 its reverse (10511078), we get a palindrome (97522579).

The spelling of 87011501 in words is "eighty-seven million, eleven thousand, five hundred one".