213667087 has 4 divisors (see below), whose sum is σ = 216856216. Its totient is φ = 210477960.

The previous prime is 213667073. The next prime is 213667093. The reversal of 213667087 is 780766312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 213667087 - 2¹⁵ = 213634319 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213667057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1594464 + ... + 1594597.

It is an arithmetic number, because the mean of its divisors is an integer number (54214054).

Almost surely, 2^213667087 is an apocalyptic number.

213667087 is a deficient number, since it is larger than the sum of its proper divisors (3189129).

213667087 is an equidigital number, since it uses as much as digits as its factorization.

213667087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3189128.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 213667087 is about 14617.3556774131. The cubic root of 213667087 is about 597.8320716156.

The spelling of 213667087 in words is "two hundred thirteen million, six hundred sixty-seven thousand, eighty-seven".