87967261 has 4 divisors (see below), whose sum is σ = 87986272. Its totient is φ = 87948252.

The previous prime is 87967219. The next prime is 87967273. The reversal of 87967261 is 16276978.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16276978 = 2 ⋅8138489.

It is a cyclic number.

It is not a de Polignac number, because 87967261 - 2⁷ = 87967133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87967291) 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, 2440 + ... + 13486.

It is an arithmetic number, because the mean of its divisors is an integer number (21996568).

Almost surely, 2^87967261 is an apocalyptic number.

It is an amenable number.

87967261 is a deficient number, since it is larger than the sum of its proper divisors (19011).

87967261 is a wasteful number, since it uses less digits than its factorization.

87967261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19010.

The product of its digits is 254016, while the sum is 46.

The square root of 87967261 is about 9379.0863627541. The cubic root of 87967261 is about 444.7408515113.

The spelling of 87967261 in words is "eighty-seven million, nine hundred sixty-seven thousand, two hundred sixty-one".