84193687 has 2 divisors, whose sum is σ = 84193688. Its totient is φ = 84193686.

The previous prime is 84193667. The next prime is 84193691. The reversal of 84193687 is 78639148.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84193687 is a prime.

It is a Chen prime.

It is equal to p_4899628 and since 84193687 and 4899628 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84193657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42096843 + 42096844.

It is an arithmetic number, because the mean of its divisors is an integer number (42096844).

Almost surely, 2^84193687 is an apocalyptic number.

84193687 is a deficient number, since it is larger than the sum of its proper divisors (1).

84193687 is an equidigital number, since it uses as much as digits as its factorization.

84193687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 46.

The square root of 84193687 is about 9175.7117980024. The cubic root of 84193687 is about 438.2882650954.

The spelling of 84193687 in words is "eighty-four million, one hundred ninety-three thousand, six hundred eighty-seven".