75640329 has 12 divisors (see below), whose sum is σ = 109338996. Its totient is φ = 50389632.

The previous prime is 75640319. The next prime is 75640339. The reversal of 75640329 is 92304657.

75640329 is a `hidden beast` number, since 7 + 5 + 640 + 3 + 2 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (75640319) and next prime (75640339).

It can be written as a sum of positive squares in 2 ways, for example, as 61779600 + 13860729 = 7860^2 + 3723^2 .

It is not a de Polignac number, because 75640329 - 2⁸ = 75640073 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 75640293 and 75640302.

It is not an unprimeable number, because it can be changed into a prime (75640319) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15829 + ... + 20045.

It is an arithmetic number, because the mean of its divisors is an integer number (9111583).

Almost surely, 2^75640329 is an apocalyptic number.

It is an amenable number.

75640329 is a deficient number, since it is larger than the sum of its proper divisors (33698667).

75640329 is a wasteful number, since it uses less digits than its factorization.

75640329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6216 (or 6213 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 75640329 is about 8697.1448763373. The cubic root of 75640329 is about 422.9130985239.

The spelling of 75640329 in words is "seventy-five million, six hundred forty thousand, three hundred twenty-nine".