75378773 has 4 divisors (see below), whose sum is σ = 76801068. Its totient is φ = 73956480.

The previous prime is 75378769. The next prime is 75378781. The reversal of 75378773 is 37787357.

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

It can be written as a sum of positive squares in 2 ways, for example, as 61105489 + 14273284 = 7817^2 + 3778^2 .

It is a cyclic number.

It is not a de Polignac number, because 75378773 - 2² = 75378769 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75378713) 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, 711068 + ... + 711173.

It is an arithmetic number, because the mean of its divisors is an integer number (19200267).

Almost surely, 2^75378773 is an apocalyptic number.

It is an amenable number.

75378773 is a deficient number, since it is larger than the sum of its proper divisors (1422295).

75378773 is a wasteful number, since it uses less digits than its factorization.

75378773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1422294.

The product of its digits is 864360, while the sum is 47.

The square root of 75378773 is about 8682.0949660782. The cubic root of 75378773 is about 422.4250731363.

The spelling of 75378773 in words is "seventy-five million, three hundred seventy-eight thousand, seven hundred seventy-three".