84937987 has 2 divisors, whose sum is σ = 84937988. Its totient is φ = 84937986.

The previous prime is 84937973. The next prime is 84938027. The reversal of 84937987 is 78973948.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84937987 - 2⁷ = 84937859 is a prime.

It is a super-2 number, since 2×84937987² = 14428923271224338, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (84937907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42468993 + 42468994.

It is an arithmetic number, because the mean of its divisors is an integer number (42468994).

Almost surely, 2^84937987 is an apocalyptic number.

84937987 is a deficient number, since it is larger than the sum of its proper divisors (1).

84937987 is an equidigital number, since it uses as much as digits as its factorization.

84937987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3048192, while the sum is 55.

The square root of 84937987 is about 9216.1807165441. The cubic root of 84937987 is about 439.5760154773.

The spelling of 84937987 in words is "eighty-four million, nine hundred thirty-seven thousand, nine hundred eighty-seven".