87834889 has 2 divisors, whose sum is σ = 87834890. Its totient is φ = 87834888.

The previous prime is 87834883. The next prime is 87834911. The reversal of 87834889 is 98843878.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69172489 + 18662400 = 8317^2 + 4320^2 .

It is a cyclic number.

It is not a de Polignac number, because 87834889 - 2²³ = 79446281 is a prime.

It is not a weakly prime, because it can be changed into another prime (87834883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43917444 + 43917445.

It is an arithmetic number, because the mean of its divisors is an integer number (43917445).

Almost surely, 2^87834889 is an apocalyptic number.

It is an amenable number.

87834889 is a deficient number, since it is larger than the sum of its proper divisors (1).

87834889 is an equidigital number, since it uses as much as digits as its factorization.

87834889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3096576, while the sum is 55.

The square root of 87834889 is about 9372.0269419160. The cubic root of 87834889 is about 444.5176594222.

The spelling of 87834889 in words is "eighty-seven million, eight hundred thirty-four thousand, eight hundred eighty-nine".