87986417 has 2 divisors, whose sum is σ = 87986418. Its totient is φ = 87986416.

The previous prime is 87986317. The next prime is 87986429. The reversal of 87986417 is 71468978.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69872881 + 18113536 = 8359^2 + 4256^2 .

It is a cyclic number.

It is not a de Polignac number, because 87986417 - 2¹⁰ = 87985393 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (87986467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43993208 + 43993209.

It is an arithmetic number, because the mean of its divisors is an integer number (43993209).

Almost surely, 2^87986417 is an apocalyptic number.

It is an amenable number.

87986417 is a deficient number, since it is larger than the sum of its proper divisors (1).

87986417 is an equidigital number, since it uses as much as digits as its factorization.

87986417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 677376, while the sum is 50.

The square root of 87986417 is about 9380.1075153753. The cubic root of 87986417 is about 444.7731318442.

The spelling of 87986417 in words is "eighty-seven million, nine hundred eighty-six thousand, four hundred seventeen".