77143461 has 16 divisors (see below), whose sum is σ = 105100416. Its totient is φ = 50313536.

The previous prime is 77143457. The next prime is 77143463. The reversal of 77143461 is 16434177.

It is not a de Polignac number, because 77143461 - 2² = 77143457 is a prime.

It is a super-2 number, since 2×77143461² = 11902227150117042, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77143463) 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 15 ways as a sum of consecutive naturals, for example, 103456 + ... + 104198.

It is an arithmetic number, because the mean of its divisors is an integer number (6568776).

Almost surely, 2^77143461 is an apocalyptic number.

It is an amenable number.

77143461 is a deficient number, since it is larger than the sum of its proper divisors (27956955).

77143461 is a wasteful number, since it uses less digits than its factorization.

77143461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1452.

The product of its digits is 14112, while the sum is 33.

The square root of 77143461 is about 8783.1350325496. The cubic root of 77143461 is about 425.6961343369.

It can be divided in two parts, 7714 and 3461, that added together give a triangular number (11175 = T₁₄₉).

The spelling of 77143461 in words is "seventy-seven million, one hundred forty-three thousand, four hundred sixty-one".