84611961 has 12 divisors (see below), whose sum is σ = 139676992. Its totient is φ = 48349656.

The previous prime is 84611957. The next prime is 84611971. The reversal of 84611961 is 16911648.

It is a happy number.

84611961 is a `hidden beast` number, since 8 + 461 + 196 + 1 = 666.

It is not a de Polignac number, because 84611961 - 2² = 84611957 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84611971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 671461 + ... + 671586.

Almost surely, 2^84611961 is an apocalyptic number.

It is an amenable number.

84611961 is a deficient number, since it is larger than the sum of its proper divisors (55065031).

84611961 is a wasteful number, since it uses less digits than its factorization.

84611961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1343060 (or 1343057 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 84611961 is about 9198.4760150799. The cubic root of 84611961 is about 439.0128714252.

The spelling of 84611961 in words is "eighty-four million, six hundred eleven thousand, nine hundred sixty-one".