84748789 has 2 divisors, whose sum is σ = 84748790. Its totient is φ = 84748788.

The previous prime is 84748787. The next prime is 84748831. The reversal of 84748789 is 98784748.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70056900 + 14691889 = 8370^2 + 3833^2 .

It is a cyclic number.

It is not a de Polignac number, because 84748789 - 2¹ = 84748787 is a prime.

Together with 84748787, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84748787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42374394 + 42374395.

It is an arithmetic number, because the mean of its divisors is an integer number (42374395).

Almost surely, 2^84748789 is an apocalyptic number.

It is an amenable number.

84748789 is a deficient number, since it is larger than the sum of its proper divisors (1).

84748789 is an equidigital number, since it uses as much as digits as its factorization.

84748789 is an evil number, because the sum of its binary digits is even.

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

The square root of 84748789 is about 9205.9105470344. The cubic root of 84748789 is about 439.2493900045.

The spelling of 84748789 in words is "eighty-four million, seven hundred forty-eight thousand, seven hundred eighty-nine".