77144137 has 8 divisors (see below), whose sum is σ = 89373056. Its totient is φ = 65217312.

The previous prime is 77144117. The next prime is 77144173. The reversal of 77144137 is 73144177.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 77144137 - 2¹⁹ = 76619849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77144117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74973 + ... + 75994.

It is an arithmetic number, because the mean of its divisors is an integer number (11171632).

Almost surely, 2^77144137 is an apocalyptic number.

It is an amenable number.

77144137 is a deficient number, since it is larger than the sum of its proper divisors (12228919).

77144137 is a wasteful number, since it uses less digits than its factorization.

77144137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151047.

The product of its digits is 16464, while the sum is 34.

The square root of 77144137 is about 8783.1735153076. The cubic root of 77144137 is about 425.6973777767.

The spelling of 77144137 in words is "seventy-seven million, one hundred forty-four thousand, one hundred thirty-seven".