84109757 has 2 divisors, whose sum is σ = 84109758. Its totient is φ = 84109756.

The previous prime is 84109733. The next prime is 84109771. The reversal of 84109757 is 75790148.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70375321 + 13734436 = 8389^2 + 3706^2 .

It is a cyclic number.

It is not a de Polignac number, because 84109757 - 2¹² = 84105661 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 (84109787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42054878 + 42054879.

It is an arithmetic number, because the mean of its divisors is an integer number (42054879).

Almost surely, 2^84109757 is an apocalyptic number.

It is an amenable number.

84109757 is a deficient number, since it is larger than the sum of its proper divisors (1).

84109757 is an equidigital number, since it uses as much as digits as its factorization.

84109757 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 70560, while the sum is 41.

The square root of 84109757 is about 9171.1371704931. The cubic root of 84109757 is about 438.1425781458.

The spelling of 84109757 in words is "eighty-four million, one hundred nine thousand, seven hundred fifty-seven".