75713821 has 2 divisors, whose sum is σ = 75713822. Its totient is φ = 75713820.

The previous prime is 75713797. The next prime is 75713849. The reversal of 75713821 is 12831757.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67076100 + 8637721 = 8190^2 + 2939^2 .

It is an emirp because it is prime and its reverse (12831757) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75713821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75213821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37856910 + 37856911.

It is an arithmetic number, because the mean of its divisors is an integer number (37856911).

Almost surely, 2^75713821 is an apocalyptic number.

It is an amenable number.

75713821 is a deficient number, since it is larger than the sum of its proper divisors (1).

75713821 is an equidigital number, since it uses as much as digits as its factorization.

75713821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11760, while the sum is 34.

The square root of 75713821 is about 8701.3689152914. The cubic root of 75713821 is about 423.0500213766.

The spelling of 75713821 in words is "seventy-five million, seven hundred thirteen thousand, eight hundred twenty-one".