87043091 has 2 divisors, whose sum is σ = 87043092. Its totient is φ = 87043090.

The previous prime is 87043079. The next prime is 87043147. The reversal of 87043091 is 19034078.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87043091 - 2⁶ = 87043027 is a prime.

It is not a weakly prime, because it can be changed into another prime (87043001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43521545 + 43521546.

It is an arithmetic number, because the mean of its divisors is an integer number (43521546).

Almost surely, 2^87043091 is an apocalyptic number.

87043091 is a deficient number, since it is larger than the sum of its proper divisors (1).

87043091 is an equidigital number, since it uses as much as digits as its factorization.

87043091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 87043091 is about 9329.6886871964. The cubic root of 87043091 is about 443.1779065211.

The spelling of 87043091 in words is "eighty-seven million, forty-three thousand, ninety-one".