75994649 has 2 divisors, whose sum is σ = 75994650. Its totient is φ = 75994648.

The previous prime is 75994627. The next prime is 75994663. The reversal of 75994649 is 94649957.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72505225 + 3489424 = 8515^2 + 1868^2 .

It is an emirp because it is prime and its reverse (94649957) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75994649 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 75994649.

It is not a weakly prime, because it can be changed into another prime (75994669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37997324 + 37997325.

It is an arithmetic number, because the mean of its divisors is an integer number (37997325).

Almost surely, 2^75994649 is an apocalyptic number.

It is an amenable number.

75994649 is a deficient number, since it is larger than the sum of its proper divisors (1).

75994649 is an equidigital number, since it uses as much as digits as its factorization.

75994649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2449440, while the sum is 53.

The square root of 75994649 is about 8717.4909807811. The cubic root of 75994649 is about 423.5724170115.

The spelling of 75994649 in words is "seventy-five million, nine hundred ninety-four thousand, six hundred forty-nine".