75720794 has 4 divisors (see below), whose sum is σ = 113581194. Its totient is φ = 37860396.

The previous prime is 75720793. The next prime is 75720803. The reversal of 75720794 is 49702757.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49702757 = 13 ⋅3823289.

It can be written as a sum of positive squares in only one way, i.e., 47789569 + 27931225 = 6913^2 + 5285^2 .

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (75720791) 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, 18930197 + ... + 18930200.

Almost surely, 2^75720794 is an apocalyptic number.

75720794 is a deficient number, since it is larger than the sum of its proper divisors (37860400).

75720794 is a wasteful number, since it uses less digits than its factorization.

75720794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37860399.

The product of its (nonzero) digits is 123480, while the sum is 41.

The square root of 75720794 is about 8701.7695901466. The cubic root of 75720794 is about 423.0630081611.

The spelling of 75720794 in words is "seventy-five million, seven hundred twenty thousand, seven hundred ninety-four".