77206331 has 4 divisors (see below), whose sum is σ = 80563152. Its totient is φ = 73849512.

The previous prime is 77206307. The next prime is 77206361. The reversal of 77206331 is 13360277.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13360277 = 7 ⋅1908611.

It is a cyclic number.

It is not a de Polignac number, because 77206331 - 2¹⁴ = 77189947 is a prime.

It is a super-2 number, since 2×77206331² = 11921635092963122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77206294 and 77206303.

It is not an unprimeable number, because it can be changed into a prime (77206361) 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 3 ways as a sum of consecutive naturals, for example, 1678376 + ... + 1678421.

It is an arithmetic number, because the mean of its divisors is an integer number (20140788).

Almost surely, 2^77206331 is an apocalyptic number.

77206331 is a deficient number, since it is larger than the sum of its proper divisors (3356821).

77206331 is a wasteful number, since it uses less digits than its factorization.

77206331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3356820.

The product of its (nonzero) digits is 5292, while the sum is 29.

The square root of 77206331 is about 8786.7133218286. The cubic root of 77206331 is about 425.8117468523.

The spelling of 77206331 in words is "seventy-seven million, two hundred six thousand, three hundred thirty-one".