77989461 has 24 divisors (see below), whose sum is σ = 115026912. Its totient is φ = 46965600.

The previous prime is 77989441. The next prime is 77989463. The reversal of 77989461 is 16498977.

It is not a de Polignac number, because 77989461 - 2⁷ = 77989333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77989463) 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 23 ways as a sum of consecutive naturals, for example, 65110 + ... + 66296.

It is an arithmetic number, because the mean of its divisors is an integer number (4792788).

Almost surely, 2^77989461 is an apocalyptic number.

It is an amenable number.

77989461 is a deficient number, since it is larger than the sum of its proper divisors (37037451).

77989461 is a wasteful number, since it uses less digits than its factorization.

77989461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1393 (or 1382 counting only the distinct ones).

The product of its digits is 762048, while the sum is 51.

The square root of 77989461 is about 8831.1641927891. The cubic root of 77989461 is about 427.2466239057.

The spelling of 77989461 in words is "seventy-seven million, nine hundred eighty-nine thousand, four hundred sixty-one".