87861043 has 2 divisors, whose sum is σ = 87861044. Its totient is φ = 87861042.

The previous prime is 87861019. The next prime is 87861047. The reversal of 87861043 is 34016878.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87861043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 87860993 and 87861011.

It is not a weakly prime, because it can be changed into another prime (87861047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43930521 + 43930522.

It is an arithmetic number, because the mean of its divisors is an integer number (43930522).

Almost surely, 2^87861043 is an apocalyptic number.

87861043 is a deficient number, since it is larger than the sum of its proper divisors (1).

87861043 is an equidigital number, since it uses as much as digits as its factorization.

87861043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 87861043 is about 9373.4221605559. The cubic root of 87861043 is about 444.5617753813.

The spelling of 87861043 in words is "eighty-seven million, eight hundred sixty-one thousand, forty-three".