77143149 has 24 divisors (see below), whose sum is σ = 114285600. Its totient is φ = 50125920.

The previous prime is 77143147. The next prime is 77143151. The reversal of 77143149 is 94134177.

It is an interprime number because it is at equal distance from previous prime (77143147) and next prime (77143151).

It is not a de Polignac number, because 77143149 - 2¹ = 77143147 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77143147) 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 23 ways as a sum of consecutive naturals, for example, 69007 + ... + 70115.

It is an arithmetic number, because the mean of its divisors is an integer number (4761900).

Almost surely, 2^77143149 is an apocalyptic number.

It is an amenable number.

77143149 is a deficient number, since it is larger than the sum of its proper divisors (37142451).

77143149 is a wasteful number, since it uses less digits than its factorization.

77143149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1305 (or 1302 counting only the distinct ones).

The product of its digits is 21168, while the sum is 36.

The square root of 77143149 is about 8783.1172712198. The cubic root of 77143149 is about 425.6955604392.

The spelling of 77143149 in words is "seventy-seven million, one hundred forty-three thousand, one hundred forty-nine".