87838117 has 2 divisors, whose sum is σ = 87838118. Its totient is φ = 87838116.

The previous prime is 87838103. The next prime is 87838141. The reversal of 87838117 is 71183878.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45144961 + 42693156 = 6719^2 + 6534^2 .

It is a cyclic number.

It is not a de Polignac number, because 87838117 - 2¹⁹ = 87313829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87836117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43919058 + 43919059.

It is an arithmetic number, because the mean of its divisors is an integer number (43919059).

Almost surely, 2^87838117 is an apocalyptic number.

It is an amenable number.

87838117 is a deficient number, since it is larger than the sum of its proper divisors (1).

87838117 is an equidigital number, since it uses as much as digits as its factorization.

87838117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75264, while the sum is 43.

The square root of 87838117 is about 9372.1991549476. The cubic root of 87838117 is about 444.5231048112.

It can be divided in two parts, 8783 and 8117, that added together give a square (16900 = 130²).

The spelling of 87838117 in words is "eighty-seven million, eight hundred thirty-eight thousand, one hundred seventeen".