75149617 has 4 divisors (see below), whose sum is σ = 79104880. Its totient is φ = 71194356.

The previous prime is 75149603. The next prime is 75149623. The reversal of 75149617 is 71694157.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75149617 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 75149617.

It is not an unprimeable number, because it can be changed into a prime (75149647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1977603 + ... + 1977640.

It is an arithmetic number, because the mean of its divisors is an integer number (19776220).

Almost surely, 2^75149617 is an apocalyptic number.

It is an amenable number.

75149617 is a deficient number, since it is larger than the sum of its proper divisors (3955263).

75149617 is a wasteful number, since it uses less digits than its factorization.

75149617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3955262.

The product of its digits is 52920, while the sum is 40.

The square root of 75149617 is about 8668.8878756159. The cubic root of 75149617 is about 421.9965727506.

The spelling of 75149617 in words is "seventy-five million, one hundred forty-nine thousand, six hundred seventeen".