87955261 has 4 divisors (see below), whose sum is σ = 88762300. Its totient is φ = 87148224.

The previous prime is 87955213. The next prime is 87955271. The reversal of 87955261 is 16255978.

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 51122500 + 36832761 = 7150^2 + 6069^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87955261 is a prime.

It is a super-3 number, since 3×87955261³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87955211) 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, 403356 + ... + 403573.

It is an arithmetic number, because the mean of its divisors is an integer number (22190575).

Almost surely, 2^87955261 is an apocalyptic number.

It is an amenable number.

87955261 is a deficient number, since it is larger than the sum of its proper divisors (807039).

87955261 is a wasteful number, since it uses less digits than its factorization.

87955261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 807038.

The product of its digits is 151200, while the sum is 43.

The square root of 87955261 is about 9378.4466197766. The cubic root of 87955261 is about 444.7206275747.

The spelling of 87955261 in words is "eighty-seven million, nine hundred fifty-five thousand, two hundred sixty-one".