75554749 has 4 divisors (see below), whose sum is σ = 79999164. Its totient is φ = 71110336.

The previous prime is 75554711. The next prime is 75554753. The reversal of 75554749 is 94745557.

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 35485849 + 40068900 = 5957^2 + 6330^2 .

It is a cyclic number.

It is not a de Polignac number, because 75554749 - 2¹³ = 75546557 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 75554699 and 75554708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75554779) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2222182 + ... + 2222215.

It is an arithmetic number, because the mean of its divisors is an integer number (19999791).

Almost surely, 2^75554749 is an apocalyptic number.

It is an amenable number.

75554749 is a deficient number, since it is larger than the sum of its proper divisors (4444415).

75554749 is a wasteful number, since it uses less digits than its factorization.

75554749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4444414.

The product of its digits is 882000, while the sum is 46.

The square root of 75554749 is about 8692.2234784893. The cubic root of 75554749 is about 422.7535427169.

The spelling of 75554749 in words is "seventy-five million, five hundred fifty-four thousand, seven hundred forty-nine".