84807389 has 2 divisors, whose sum is σ = 84807390. Its totient is φ = 84807388.

The previous prime is 84807353. The next prime is 84807403. The reversal of 84807389 is 98370848.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78765625 + 6041764 = 8875^2 + 2458^2 .

It is a cyclic number.

It is not a de Polignac number, because 84807389 - 2²⁴ = 68030173 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84807329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42403694 + 42403695.

It is an arithmetic number, because the mean of its divisors is an integer number (42403695).

Almost surely, 2^84807389 is an apocalyptic number.

It is an amenable number.

84807389 is a deficient number, since it is larger than the sum of its proper divisors (1).

84807389 is an equidigital number, since it uses as much as digits as its factorization.

84807389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 387072, while the sum is 47.

The square root of 84807389 is about 9209.0927349007. The cubic root of 84807389 is about 439.3506071198.

The spelling of 84807389 in words is "eighty-four million, eight hundred seven thousand, three hundred eighty-nine".