87694261 has 4 divisors (see below), whose sum is σ = 87740172. Its totient is φ = 87648352.

The previous prime is 87694259. The next prime is 87694297. The reversal of 87694261 is 16249678.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16249678 = 2 ⋅8124839.

It can be written as a sum of positive squares in 2 ways, for example, as 29095236 + 58599025 = 5394^2 + 7655^2 .

It is a cyclic number.

It is not a de Polignac number, because 87694261 - 2¹ = 87694259 is a prime.

It is a super-2 number, since 2×87694261² = 15380566824672242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87697261) 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, 19960 + ... + 23953.

It is an arithmetic number, because the mean of its divisors is an integer number (21935043).

It is a Poulet number, since it divides 2^87694260-1.

Almost surely, 2^87694261 is an apocalyptic number.

It is an amenable number.

87694261 is a deficient number, since it is larger than the sum of its proper divisors (45911).

87694261 is a wasteful number, since it uses less digits than its factorization.

87694261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45910.

The product of its digits is 145152, while the sum is 43.

The square root of 87694261 is about 9364.5213972739. The cubic root of 87694261 is about 444.2803011194.

The spelling of 87694261 in words is "eighty-seven million, six hundred ninety-four thousand, two hundred sixty-one".