87061315697 has 4 divisors (see below), whose sum is σ = 87080015076. Its totient is φ = 87042616320.

The previous prime is 87061315681. The next prime is 87061315763. The reversal of 87061315697 is 79651316078.

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 6746322496 + 80314993201 = 82136^2 + 283399^2 .

It is a cyclic number.

It is not a de Polignac number, because 87061315697 - 2⁴ = 87061315681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87061315597) 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, 9342704 + ... + 9352017.

It is an arithmetic number, because the mean of its divisors is an integer number (21770003769).

Almost surely, 2^87061315697 is an apocalyptic number.

It is an amenable number.

87061315697 is a deficient number, since it is larger than the sum of its proper divisors (18699379).

87061315697 is a wasteful number, since it uses less digits than its factorization.

87061315697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18699378.

The product of its (nonzero) digits is 1905120, while the sum is 53.

The spelling of 87061315697 in words is "eighty-seven billion, sixty-one million, three hundred fifteen thousand, six hundred ninety-seven".