77021134 has 16 divisors (see below), whose sum is σ = 117992160. Its totient is φ = 37699200.

The previous prime is 77021099. The next prime is 77021141. The reversal of 77021134 is 43112077.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 77021099 and 77021108.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16234 + ... + 20434.

It is an arithmetic number, because the mean of its divisors is an integer number (7374510).

Almost surely, 2^77021134 is an apocalyptic number.

77021134 is a deficient number, since it is larger than the sum of its proper divisors (40971026).

77021134 is a wasteful number, since it uses less digits than its factorization.

77021134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4395.

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 77021134 is about 8776.1685261850. The cubic root of 77021134 is about 425.4710053827.

It can be divided in two parts, 7702 and 1134, that added together give a square (8836 = 94²).

The spelling of 77021134 in words is "seventy-seven million, twenty-one thousand, one hundred thirty-four".