84154879 has 4 divisors (see below), whose sum is σ = 89105184. Its totient is φ = 79204576.

The previous prime is 84154877. The next prime is 84154883. The reversal of 84154879 is 97845148.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 84154879 - 2¹ = 84154877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84154871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2475127 + ... + 2475160.

It is an arithmetic number, because the mean of its divisors is an integer number (22276296).

Almost surely, 2^84154879 is an apocalyptic number.

84154879 is a deficient number, since it is larger than the sum of its proper divisors (4950305).

84154879 is a wasteful number, since it uses less digits than its factorization.

84154879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4950304.

The product of its digits is 322560, while the sum is 46.

The square root of 84154879 is about 9173.5968409343. The cubic root of 84154879 is about 438.2209136283.

The spelling of 84154879 in words is "eighty-four million, one hundred fifty-four thousand, eight hundred seventy-nine".