84361279 has 2 divisors, whose sum is σ = 84361280. Its totient is φ = 84361278.

The previous prime is 84361271. The next prime is 84361307. The reversal of 84361279 is 97216348.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84361279 - 2³ = 84361271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84361271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42180639 + 42180640.

It is an arithmetic number, because the mean of its divisors is an integer number (42180640).

Almost surely, 2^84361279 is an apocalyptic number.

84361279 is a deficient number, since it is larger than the sum of its proper divisors (1).

84361279 is an equidigital number, since it uses as much as digits as its factorization.

84361279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 40.

The square root of 84361279 is about 9184.8396284312. The cubic root of 84361279 is about 438.5788843631.

The spelling of 84361279 in words is "eighty-four million, three hundred sixty-one thousand, two hundred seventy-nine".