75797749 has 4 divisors (see below), whose sum is σ = 75819564. Its totient is φ = 75775936.

The previous prime is 75797737. The next prime is 75797767. The reversal of 75797749 is 94779757.

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 2951524 + 72846225 = 1718^2 + 8535^2 .

It is a cyclic number.

It is not a de Polignac number, because 75797749 - 2⁵ = 75797717 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 75797749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75797789) 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, 4402 + ... + 13075.

It is an arithmetic number, because the mean of its divisors is an integer number (18954891).

Almost surely, 2^75797749 is an apocalyptic number.

It is an amenable number.

75797749 is a deficient number, since it is larger than the sum of its proper divisors (21815).

75797749 is a wasteful number, since it uses less digits than its factorization.

75797749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21814.

The product of its digits is 3889620, while the sum is 55.

The square root of 75797749 is about 8706.1902689983. The cubic root of 75797749 is about 423.2062792017.

The spelling of 75797749 in words is "seventy-five million, seven hundred ninety-seven thousand, seven hundred forty-nine".