75349639 has 4 divisors (see below), whose sum is σ = 75419424. Its totient is φ = 75279856.

The previous prime is 75349621. The next prime is 75349663. The reversal of 75349639 is 93694357.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 75349639 - 2²³ = 66961031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75349609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33247 + ... + 35440.

It is an arithmetic number, because the mean of its divisors is an integer number (18854856).

Almost surely, 2^75349639 is an apocalyptic number.

75349639 is a deficient number, since it is larger than the sum of its proper divisors (69785).

75349639 is a wasteful number, since it uses less digits than its factorization.

75349639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69784.

The product of its digits is 612360, while the sum is 46.

The square root of 75349639 is about 8680.4169830717. The cubic root of 75349639 is about 422.3706434984.

The spelling of 75349639 in words is "seventy-five million, three hundred forty-nine thousand, six hundred thirty-nine".