84997487 has 2 divisors, whose sum is σ = 84997488. Its totient is φ = 84997486.

The previous prime is 84997481. The next prime is 84997499. The reversal of 84997487 is 78479948.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84997487 - 2¹⁰ = 84996463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84997481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42498743 + 42498744.

It is an arithmetic number, because the mean of its divisors is an integer number (42498744).

Almost surely, 2^84997487 is an apocalyptic number.

84997487 is a deficient number, since it is larger than the sum of its proper divisors (1).

84997487 is an equidigital number, since it uses as much as digits as its factorization.

84997487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4064256, while the sum is 56.

The square root of 84997487 is about 9219.4081697254. The cubic root of 84997487 is about 439.6786341406.

The spelling of 84997487 in words is "eighty-four million, nine hundred ninety-seven thousand, four hundred eighty-seven".