77842961 has 8 divisors (see below), whose sum is σ = 90035904. Its totient is φ = 65918160.

The previous prime is 77842927. The next prime is 77842967. The reversal of 77842961 is 16924877.

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

It is not a de Polignac number, because 77842961 - 2¹⁰ = 77841937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77842967) 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 7 ways as a sum of consecutive naturals, for example, 66410 + ... + 67571.

It is an arithmetic number, because the mean of its divisors is an integer number (11254488).

Almost surely, 2^77842961 is an apocalyptic number.

It is an amenable number.

77842961 is a deficient number, since it is larger than the sum of its proper divisors (12192943).

77842961 is a wasteful number, since it uses less digits than its factorization.

77842961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134071.

The product of its digits is 169344, while the sum is 44.

The square root of 77842961 is about 8822.8658042611. The cubic root of 77842961 is about 426.9789344748.

The spelling of 77842961 in words is "seventy-seven million, eight hundred forty-two thousand, nine hundred sixty-one".