87343672261 has 4 divisors (see below), whose sum is σ = 87981217452. Its totient is φ = 86706127072.

The previous prime is 87343672249. The next prime is 87343672289. The reversal of 87343672261 is 16227634378.

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 58995552100 + 28348120161 = 242890^2 + 168369^2 .

It is a cyclic number.

It is not a de Polignac number, because 87343672261 - 2¹⁷ = 87343541189 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87343672061) 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, 318772390 + ... + 318772663.

It is an arithmetic number, because the mean of its divisors is an integer number (21995304363).

Almost surely, 2^87343672261 is an apocalyptic number.

It is an amenable number.

87343672261 is a deficient number, since it is larger than the sum of its proper divisors (637545191).

87343672261 is a wasteful number, since it uses less digits than its factorization.

87343672261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637545190.

The product of its digits is 2032128, while the sum is 49.

The spelling of 87343672261 in words is "eighty-seven billion, three hundred forty-three million, six hundred seventy-two thousand, two hundred sixty-one".