84009377 has 2 divisors, whose sum is σ = 84009378. Its totient is φ = 84009376.

The previous prime is 84009347. The next prime is 84009389. The reversal of 84009377 is 77390048.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67881121 + 16128256 = 8239^2 + 4016^2 .

It is a cyclic number.

It is not a de Polignac number, because 84009377 - 2¹⁸ = 83747233 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 84009377.

It is not a weakly prime, because it can be changed into another prime (84009307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42004688 + 42004689.

It is an arithmetic number, because the mean of its divisors is an integer number (42004689).

Almost surely, 2^84009377 is an apocalyptic number.

It is an amenable number.

84009377 is a deficient number, since it is larger than the sum of its proper divisors (1).

84009377 is an equidigital number, since it uses as much as digits as its factorization.

84009377 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 84009377 is about 9165.6629329253. The cubic root of 84009377 is about 437.9682097122.

The spelling of 84009377 in words is "eighty-four million, nine thousand, three hundred seventy-seven".