77130826 has 4 divisors (see below), whose sum is σ = 115696242. Its totient is φ = 38565412.

The previous prime is 77130817. The next prime is 77130913. The reversal of 77130826 is 62803177.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 74805201 + 2325625 = 8649^2 + 1525^2 .

It is a junction number, because it is equal to n+sod(n) for n = 77130791 and 77130800.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19282705 + ... + 19282708.

Almost surely, 2^77130826 is an apocalyptic number.

77130826 is a deficient number, since it is larger than the sum of its proper divisors (38565416).

77130826 is a wasteful number, since it uses less digits than its factorization.

77130826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38565415.

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 77130826 is about 8782.4157268943. The cubic root of 77130826 is about 425.6728920804.

The spelling of 77130826 in words is "seventy-seven million, one hundred thirty thousand, eight hundred twenty-six".