75299997 has 4 divisors (see below), whose sum is σ = 100400000. Its totient is φ = 50199996.

The previous prime is 75299993. The next prime is 75300013. The reversal of 75299997 is 79999257.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 75299997 - 2² = 75299993 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 (75299993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12549997 + ... + 12550002.

It is an arithmetic number, because the mean of its divisors is an integer number (25100000).

Almost surely, 2^75299997 is an apocalyptic number.

It is an amenable number.

75299997 is a deficient number, since it is larger than the sum of its proper divisors (25100003).

75299997 is a wasteful number, since it uses less digits than its factorization.

75299997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25100002.

The product of its digits is 3214890, while the sum is 57.

The square root of 75299997 is about 8677.5570871069. The cubic root of 75299997 is about 422.2778674302.

The spelling of 75299997 in words is "seventy-five million, two hundred ninety-nine thousand, nine hundred ninety-seven".