77307345 has 32 divisors (see below), whose sum is σ = 140797440. Its totient is φ = 40222080.

The previous prime is 77307343. The next prime is 77307379. The reversal of 77307345 is 54370377.

77307345 is a `hidden beast` number, since 7 + 7 + 307 + 345 = 666.

It is not a de Polignac number, because 77307345 - 2¹ = 77307343 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77307343) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1449 + ... + 12518.

It is an arithmetic number, because the mean of its divisors is an integer number (4399920).

Almost surely, 2^77307345 is an apocalyptic number.

It is an amenable number.

77307345 is a deficient number, since it is larger than the sum of its proper divisors (63490095).

77307345 is a wasteful number, since it uses less digits than its factorization.

77307345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14022 (or 14016 counting only the distinct ones).

The product of its (nonzero) digits is 61740, while the sum is 36.

The square root of 77307345 is about 8792.4595535038. The cubic root of 77307345 is about 425.9973715370.

The spelling of 77307345 in words is "seventy-seven million, three hundred seven thousand, three hundred forty-five".