84440961 has 20 divisors (see below), whose sum is σ = 137608944. Its totient is φ = 51175800.

The previous prime is 84440947. The next prime is 84440969. The reversal of 84440961 is 16904448.

It is a happy number.

It is not a de Polignac number, because 84440961 - 2⁹ = 84440449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84440969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 46495 + ... + 48276.

Almost surely, 2^84440961 is an apocalyptic number.

84440961 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

It is an amenable number.

84440961 is a deficient number, since it is larger than the sum of its proper divisors (53167983).

84440961 is a wasteful number, since it uses less digits than its factorization.

84440961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94794 (or 94785 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 84440961 is about 9189.1762960561. The cubic root of 84440961 is about 438.7169249667.

The spelling of 84440961 in words is "eighty-four million, four hundred forty thousand, nine hundred sixty-one".