87745185697 has 4 divisors (see below), whose sum is σ = 94494815380. Its totient is φ = 80995556016.

The previous prime is 87745185667. The next prime is 87745185709. The reversal of 87745185697 is 79658154778.

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 16757043601 + 70988142096 = 129449^2 + 266436^2 .

It is a cyclic number.

It is not a de Polignac number, because 87745185697 - 2¹¹ = 87745183649 is a prime.

It is a super-2 number, since 2×87745185697² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87745185617) 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, 3374814822 + ... + 3374814847.

It is an arithmetic number, because the mean of its divisors is an integer number (23623703845).

Almost surely, 2^87745185697 is an apocalyptic number.

It is an amenable number.

87745185697 is a deficient number, since it is larger than the sum of its proper divisors (6749629683).

87745185697 is a wasteful number, since it uses less digits than its factorization.

87745185697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6749629682.

The product of its digits is 118540800, while the sum is 67.

The spelling of 87745185697 in words is "eighty-seven billion, seven hundred forty-five million, one hundred eighty-five thousand, six hundred ninety-seven".