84620987 has 8 divisors (see below), whose sum is σ = 93078192. Its totient is φ = 76926960.

The previous prime is 84620981. The next prime is 84620993. The reversal of 84620987 is 78902648.

It is an interprime number because it is at equal distance from previous prime (84620981) and next prime (84620993).

It is not a de Polignac number, because 84620987 - 2¹⁰ = 84619963 is a prime.

It is a super-2 number, since 2×84620987² = 14321422881708338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84620981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30458 + ... + 33119.

It is an arithmetic number, because the mean of its divisors is an integer number (11634774).

Almost surely, 2^84620987 is an apocalyptic number.

84620987 is a deficient number, since it is larger than the sum of its proper divisors (8457205).

84620987 is an equidigital number, since it uses as much as digits as its factorization.

84620987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63610 (or 63588 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 44.

The square root of 84620987 is about 9198.9666267467. The cubic root of 84620987 is about 439.0284814691.

The spelling of 84620987 in words is "eighty-four million, six hundred twenty thousand, nine hundred eighty-seven".