75639349 has 8 divisors (see below), whose sum is σ = 78191360. Its totient is φ = 73170540.

The previous prime is 75639283. The next prime is 75639367. The reversal of 75639349 is 94393657.

It is not a de Polignac number, because 75639349 - 2²³ = 67250741 is a prime.

It is a super-2 number, since 2×75639349² = 11442622234287602, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 75639299 and 75639308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75639649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28522 + ... + 31060.

It is an arithmetic number, because the mean of its divisors is an integer number (9773920).

Almost surely, 2^75639349 is an apocalyptic number.

It is an amenable number.

75639349 is a deficient number, since it is larger than the sum of its proper divisors (2552011).

75639349 is an frugal number, since it uses more digits than its factorization.

75639349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2632 (or 2570 counting only the distinct ones).

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

The square root of 75639349 is about 8697.0885358262. The cubic root of 75639349 is about 422.9112720880.

The spelling of 75639349 in words is "seventy-five million, six hundred thirty-nine thousand, three hundred forty-nine".