77121484 has 24 divisors (see below), whose sum is σ = 153635328. Its totient is φ = 33530640.

The previous prime is 77121481. The next prime is 77121487. The reversal of 77121484 is 48412177.

It is an interprime number because it is at equal distance from previous prime (77121481) and next prime (77121487).

It is not an unprimeable number, because it can be changed into a prime (77121481) 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 7 ways as a sum of consecutive naturals, for example, 37092 + ... + 39115.

It is an arithmetic number, because the mean of its divisors is an integer number (6401472).

Almost surely, 2^77121484 is an apocalyptic number.

It is an amenable number.

77121484 is a deficient number, since it is larger than the sum of its proper divisors (76513844).

77121484 is a wasteful number, since it uses less digits than its factorization.

77121484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76245 (or 76243 counting only the distinct ones).

The product of its digits is 12544, while the sum is 34.

The square root of 77121484 is about 8781.8838525683. The cubic root of 77121484 is about 425.6557057105.

The spelling of 77121484 in words is "seventy-seven million, one hundred twenty-one thousand, four hundred eighty-four".