75641407 has 4 divisors (see below), whose sum is σ = 75770856. Its totient is φ = 75511960.

The previous prime is 75641387. The next prime is 75641443. The reversal of 75641407 is 70414657.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75641407 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 (75641477) 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, 63844 + ... + 65017.

It is an arithmetic number, because the mean of its divisors is an integer number (18942714).

Almost surely, 2^75641407 is an apocalyptic number.

75641407 is a deficient number, since it is larger than the sum of its proper divisors (129449).

75641407 is a wasteful number, since it uses less digits than its factorization.

75641407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129448.

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 75641407 is about 8697.2068504779. The cubic root of 75641407 is about 422.9151075851.

The spelling of 75641407 in words is "seventy-five million, six hundred forty-one thousand, four hundred seven".