75780907 has 2 divisors, whose sum is σ = 75780908. Its totient is φ = 75780906.

The previous prime is 75780877. The next prime is 75780961. The reversal of 75780907 is 70908757.

It is a weak prime.

It is an emirp because it is prime and its reverse (70908757) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75780907 is a prime.

It is not a weakly prime, because it can be changed into another prime (75780007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37890453 + 37890454.

It is an arithmetic number, because the mean of its divisors is an integer number (37890454).

Almost surely, 2^75780907 is an apocalyptic number.

75780907 is a deficient number, since it is larger than the sum of its proper divisors (1).

75780907 is an equidigital number, since it uses as much as digits as its factorization.

75780907 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 123480, while the sum is 43.

The square root of 75780907 is about 8705.2229724459. Note that the first 3 decimals coincide. The cubic root of 75780907 is about 423.1749318850.

The spelling of 75780907 in words is "seventy-five million, seven hundred eighty thousand, nine hundred seven".