77769142 has 16 divisors (see below), whose sum is σ = 131364864. Its totient is φ = 34209000.

The previous prime is 77769137. The next prime is 77769151. The reversal of 77769142 is 24196777.

It is a congruent number.

It is an unprimeable number.

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, 56334 + ... + 57697.

It is an arithmetic number, because the mean of its divisors is an integer number (8210304).

Almost surely, 2^77769142 is an apocalyptic number.

77769142 is a deficient number, since it is larger than the sum of its proper divisors (53595722).

77769142 is a wasteful number, since it uses less digits than its factorization.

77769142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114075.

The product of its digits is 148176, while the sum is 43.

The square root of 77769142 is about 8818.6814207114. The cubic root of 77769142 is about 426.8439227962.

The spelling of 77769142 in words is "seventy-seven million, seven hundred sixty-nine thousand, one hundred forty-two".