75657643 has 2 divisors, whose sum is σ = 75657644. Its totient is φ = 75657642.

The previous prime is 75657641. The next prime is 75657661. The reversal of 75657643 is 34675657.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 75657643 - 2¹ = 75657641 is a prime.

Together with 75657641, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 75657643.

It is not a weakly prime, because it can be changed into another prime (75657641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37828821 + 37828822.

It is an arithmetic number, because the mean of its divisors is an integer number (37828822).

Almost surely, 2^75657643 is an apocalyptic number.

75657643 is a deficient number, since it is larger than the sum of its proper divisors (1).

75657643 is an equidigital number, since it uses as much as digits as its factorization.

75657643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 529200, while the sum is 43.

The square root of 75657643 is about 8698.1402035148. The cubic root of 75657643 is about 422.9453641987.

The spelling of 75657643 in words is "seventy-five million, six hundred fifty-seven thousand, six hundred forty-three".