213008491 has 2 divisors, whose sum is σ = 213008492. Its totient is φ = 213008490.

The previous prime is 213008483. The next prime is 213008501. The reversal of 213008491 is 194800312.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213008491 - 2³ = 213008483 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (213003491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106504245 + 106504246.

It is an arithmetic number, because the mean of its divisors is an integer number (106504246).

Almost surely, 2^213008491 is an apocalyptic number.

213008491 is a deficient number, since it is larger than the sum of its proper divisors (1).

213008491 is an equidigital number, since it uses as much as digits as its factorization.

213008491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 213008491 is about 14594.8104132942. The cubic root of 213008491 is about 597.2171975640.

It can be divided in two parts, 21300 and 8491, that added together give a cube (29791 = 31³).

The spelling of 213008491 in words is "two hundred thirteen million, eight thousand, four hundred ninety-one".