84678121 has 8 divisors (see below), whose sum is σ = 92589984. Its totient is φ = 76801920.

The previous prime is 84678101. The next prime is 84678127. The reversal of 84678121 is 12187648.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 84678121 - 2¹³ = 84669929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84678127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3816 + ... + 13561.

It is an arithmetic number, because the mean of its divisors is an integer number (11573748).

Almost surely, 2^84678121 is an apocalyptic number.

It is an amenable number.

84678121 is a deficient number, since it is larger than the sum of its proper divisors (7911863).

84678121 is a wasteful number, since it uses less digits than its factorization.

84678121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17831.

The product of its digits is 21504, while the sum is 37.

The square root of 84678121 is about 9202.0715602521. The cubic root of 84678121 is about 439.1272663018.

The spelling of 84678121 in words is "eighty-four million, six hundred seventy-eight thousand, one hundred twenty-one".