213970087 has 2 divisors, whose sum is σ = 213970088. Its totient is φ = 213970086.

The previous prime is 213970079. The next prime is 213970111. The reversal of 213970087 is 780079312.

213970087 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213970087 - 2³ = 213970079 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213970027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106985043 + 106985044.

It is an arithmetic number, because the mean of its divisors is an integer number (106985044).

Almost surely, 2^213970087 is an apocalyptic number.

213970087 is a deficient number, since it is larger than the sum of its proper divisors (1).

213970087 is an equidigital number, since it uses as much as digits as its factorization.

213970087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 213970087 is about 14627.7163973055. The cubic root of 213970087 is about 598.1145321506.

The spelling of 213970087 in words is "two hundred thirteen million, nine hundred seventy thousand, eighty-seven".