77829146 has 4 divisors (see below), whose sum is σ = 116743722. Its totient is φ = 38914572.

The previous prime is 77829137. The next prime is 77829151. The reversal of 77829146 is 64192877.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64192877 = 7 ⋅9170411.

It can be written as a sum of positive squares in only one way, i.e., 64176121 + 13653025 = 8011^2 + 3695^2 .

It is a junction number, because it is equal to n+sod(n) for n = 77829097 and 77829106.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19457285 + ... + 19457288.

Almost surely, 2^77829146 is an apocalyptic number.

77829146 is a deficient number, since it is larger than the sum of its proper divisors (38914576).

77829146 is a wasteful number, since it uses less digits than its factorization.

77829146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38914575.

The product of its digits is 169344, while the sum is 44.

The square root of 77829146 is about 8822.0828606401. The cubic root of 77829146 is about 426.9536739464.

The spelling of 77829146 in words is "seventy-seven million, eight hundred twenty-nine thousand, one hundred forty-six".