84319961 has 4 divisors (see below), whose sum is σ = 91985424. Its totient is φ = 76654500.

The previous prime is 84319957. The next prime is 84319973. The reversal of 84319961 is 16991348.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 84319961 - 2² = 84319957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (84319981) 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, 3832715 + ... + 3832736.

It is an arithmetic number, because the mean of its divisors is an integer number (22996356).

Almost surely, 2^84319961 is an apocalyptic number.

It is an amenable number.

84319961 is a deficient number, since it is larger than the sum of its proper divisors (7665463).

84319961 is a wasteful number, since it uses less digits than its factorization.

84319961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7665462.

The product of its digits is 46656, while the sum is 41.

The square root of 84319961 is about 9182.5901030156. The cubic root of 84319961 is about 438.5072710914.

The spelling of 84319961 in words is "eighty-four million, three hundred nineteen thousand, nine hundred sixty-one".