75307109897 has 4 divisors (see below), whose sum is σ = 77903906820. Its totient is φ = 72710312976.

The previous prime is 75307109893. The next prime is 75307109903. The reversal of 75307109897 is 79890170357.

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

It can be written as a sum of positive squares in 2 ways, for example, as 17843349241 + 57463760656 = 133579^2 + 239716^2 .

It is a cyclic number.

It is not a de Polignac number, because 75307109897 - 2² = 75307109893 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75307109893) 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, 1298398418 + ... + 1298398475.

It is an arithmetic number, because the mean of its divisors is an integer number (19475976705).

Almost surely, 2^75307109897 is an apocalyptic number.

It is an amenable number.

75307109897 is a deficient number, since it is larger than the sum of its proper divisors (2596796923).

75307109897 is a wasteful number, since it uses less digits than its factorization.

75307109897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2596796922.

The product of its (nonzero) digits is 3333960, while the sum is 56.

The spelling of 75307109897 in words is "seventy-five billion, three hundred seven million, one hundred nine thousand, eight hundred ninety-seven".