75427997 has 16 divisors (see below), whose sum is σ = 82840320. Its totient is φ = 68395008.

The previous prime is 75427969. The next prime is 75427999. The reversal of 75427997 is 79972457.

It is a cyclic number.

It is not a de Polignac number, because 75427997 - 2¹⁰ = 75426973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75427999) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52829 + ... + 54237.

It is an arithmetic number, because the mean of its divisors is an integer number (5177520).

Almost surely, 2^75427997 is an apocalyptic number.

It is an amenable number.

75427997 is a deficient number, since it is larger than the sum of its proper divisors (7412323).

75427997 is a wasteful number, since it uses less digits than its factorization.

75427997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1540.

The product of its digits is 1111320, while the sum is 50.

The square root of 75427997 is about 8684.9293031089. The cubic root of 75427997 is about 422.5170040890.

The spelling of 75427997 in words is "seventy-five million, four hundred twenty-seven thousand, nine hundred ninety-seven".