87856141 has 2 divisors, whose sum is σ = 87856142. Its totient is φ = 87856140.

The previous prime is 87856129. The next prime is 87856151. The reversal of 87856141 is 14165878.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70392100 + 17464041 = 8390^2 + 4179^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87856141 is a prime.

It is a super-2 number, since 2×87856141² = 15437403022823762, which contains 22 as substring.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is equal to p_5099926 and since 87856141 and 5099926 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 87856094 and 87856103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87856151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43928070 + 43928071.

It is an arithmetic number, because the mean of its divisors is an integer number (43928071).

Almost surely, 2^87856141 is an apocalyptic number.

It is an amenable number.

87856141 is a deficient number, since it is larger than the sum of its proper divisors (1).

87856141 is an equidigital number, since it uses as much as digits as its factorization.

87856141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 53760, while the sum is 40.

The square root of 87856141 is about 9373.1606729000. The cubic root of 87856141 is about 444.5535074684.

The spelling of 87856141 in words is "eighty-seven million, eight hundred fifty-six thousand, one hundred forty-one".