87234139 has 2 divisors, whose sum is σ = 87234140. Its totient is φ = 87234138.

The previous prime is 87234127. The next prime is 87234179. The reversal of 87234139 is 93143278.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87234139 - 2⁵ = 87234107 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 87234098 and 87234107.

It is not a weakly prime, because it can be changed into another prime (87234179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43617069 + 43617070.

It is an arithmetic number, because the mean of its divisors is an integer number (43617070).

Almost surely, 2^87234139 is an apocalyptic number.

87234139 is a deficient number, since it is larger than the sum of its proper divisors (1).

87234139 is an equidigital number, since it uses as much as digits as its factorization.

87234139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 37.

The square root of 87234139 is about 9339.9217876811. The cubic root of 87234139 is about 443.5019084300.

The spelling of 87234139 in words is "eighty-seven million, two hundred thirty-four thousand, one hundred thirty-nine".