84451847279 has 2 divisors, whose sum is σ = 84451847280. Its totient is φ = 84451847278.

The previous prime is 84451847231. The next prime is 84451847287. The reversal of 84451847279 is 97274815448.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84451847279 - 2³⁶ = 15732370543 is a prime.

It is a super-2 number, since 2×84451847279² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84451147279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42225923639 + 42225923640.

It is an arithmetic number, because the mean of its divisors is an integer number (42225923640).

Almost surely, 2^84451847279 is an apocalyptic number.

84451847279 is a deficient number, since it is larger than the sum of its proper divisors (1).

84451847279 is an equidigital number, since it uses as much as digits as its factorization.

84451847279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18063360, while the sum is 59.

The spelling of 84451847279 in words is "eighty-four billion, four hundred fifty-one million, eight hundred forty-seven thousand, two hundred seventy-nine".