77433331 has 4 divisors (see below), whose sum is σ = 77571432. Its totient is φ = 77295232.

The previous prime is 77433289. The next prime is 77433353. The reversal of 77433331 is 13333477.

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

It is a cyclic number.

It is not a de Polignac number, because 77433331 - 2⁹ = 77432819 is a prime.

It is a super-2 number, since 2×77433331² = 11991841499511122, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 77433293 and 77433302.

It is not an unprimeable number, because it can be changed into a prime (77433131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68206 + ... + 69331.

It is an arithmetic number, because the mean of its divisors is an integer number (19392858).

Almost surely, 2^77433331 is an apocalyptic number.

77433331 is a deficient number, since it is larger than the sum of its proper divisors (138101).

77433331 is a wasteful number, since it uses less digits than its factorization.

77433331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138100.

The product of its digits is 15876, while the sum is 31.

The square root of 77433331 is about 8799.6210713871. The cubic root of 77433331 is about 426.2286586438.

The spelling of 77433331 in words is "seventy-seven million, four hundred thirty-three thousand, three hundred thirty-one".