75339905 has 4 divisors (see below), whose sum is σ = 90407892. Its totient is φ = 60271920.

The previous prime is 75339899. The next prime is 75339907. The reversal of 75339905 is 50993357.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50993357 = 31 ⋅1644947.

It can be written as a sum of positive squares in 2 ways, for example, as 23902321 + 51437584 = 4889^2 + 7172^2 .

It is a de Polignac number, because none of the positive numbers 2^k-75339905 is a prime.

It is a super-2 number, since 2×75339905² = 11352202570818050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75339907) 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, 7533986 + ... + 7533995.

It is an arithmetic number, because the mean of its divisors is an integer number (22601973).

Almost surely, 2^75339905 is an apocalyptic number.

It is an amenable number.

75339905 is a deficient number, since it is larger than the sum of its proper divisors (15067987).

75339905 is a wasteful number, since it uses less digits than its factorization.

75339905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15067986.

The product of its (nonzero) digits is 127575, while the sum is 41.

The square root of 75339905 is about 8679.8562776120. The cubic root of 75339905 is about 422.3524548118.

The spelling of 75339905 in words is "seventy-five million, three hundred thirty-nine thousand, nine hundred five".