77107445 has 8 divisors (see below), whose sum is σ = 95029944. Its totient is φ = 60018624.

The previous prime is 77107441. The next prime is 77107469. The reversal of 77107445 is 54470177.

It can be written as a sum of positive squares in 4 ways, for example, as 2007889 + 75099556 = 1417^2 + 8666^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 77107445 - 2² = 77107441 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77107441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 208214 + ... + 208583.

It is an arithmetic number, because the mean of its divisors is an integer number (11878743).

Almost surely, 2^77107445 is an apocalyptic number.

It is an amenable number.

77107445 is a deficient number, since it is larger than the sum of its proper divisors (17922499).

77107445 is a wasteful number, since it uses less digits than its factorization.

77107445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416839.

The product of its (nonzero) digits is 27440, while the sum is 35.

The square root of 77107445 is about 8781.0845002198. The cubic root of 77107445 is about 425.6298757135.

The spelling of 77107445 in words is "seventy-seven million, one hundred seven thousand, four hundred forty-five".