77141985 has 8 divisors (see below), whose sum is σ = 123427200. Its totient is φ = 41142384.

The previous prime is 77141963. The next prime is 77141989. The reversal of 77141985 is 58914177.

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

It is not a de Polignac number, because 77141985 - 2⁶ = 77141921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77141989) 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, 2571385 + ... + 2571414.

It is an arithmetic number, because the mean of its divisors is an integer number (15428400).

Almost surely, 2^77141985 is an apocalyptic number.

It is an amenable number.

77141985 is a deficient number, since it is larger than the sum of its proper divisors (46285215).

77141985 is a wasteful number, since it uses less digits than its factorization.

77141985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5142807.

The product of its digits is 70560, while the sum is 42.

The square root of 77141985 is about 8783.0510074803. The cubic root of 77141985 is about 425.6934193455.

The spelling of 77141985 in words is "seventy-seven million, one hundred forty-one thousand, nine hundred eighty-five".