84870940087 has 4 divisors (see below), whose sum is σ = 85012628400. Its totient is φ = 84729251776.

The previous prime is 84870940073. The next prime is 84870940103. The reversal of 84870940087 is 78004907848.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 84870940087 - 2²³ = 84862551479 is a prime.

It is a super-2 number, since 2×84870940087² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84870940387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70843258 + ... + 70844455.

It is an arithmetic number, because the mean of its divisors is an integer number (21253157100).

Almost surely, 2^84870940087 is an apocalyptic number.

84870940087 is a deficient number, since it is larger than the sum of its proper divisors (141688313).

84870940087 is a wasteful number, since it uses less digits than its factorization.

84870940087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141688312.

The product of its (nonzero) digits is 3612672, while the sum is 55.

The spelling of 84870940087 in words is "eighty-four billion, eight hundred seventy million, nine hundred forty thousand, eighty-seven".