213189497 has 2 divisors, whose sum is σ = 213189498. Its totient is φ = 213189496.

The previous prime is 213189451. The next prime is 213189517. The reversal of 213189497 is 794981312.

213189497 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 177715561 + 35473936 = 13331^2 + 5956^2 .

It is a cyclic number.

It is not a de Polignac number, because 213189497 - 2⁶ = 213189433 is a prime.

It is a super-2 number, since 2×213189497² = 90899523262226018, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (213189407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106594748 + 106594749.

It is an arithmetic number, because the mean of its divisors is an integer number (106594749).

Almost surely, 2^213189497 is an apocalyptic number.

It is an amenable number.

213189497 is a deficient number, since it is larger than the sum of its proper divisors (1).

213189497 is an equidigital number, since it uses as much as digits as its factorization.

213189497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 44.

The square root of 213189497 is about 14601.0101362885. The cubic root of 213189497 is about 597.3863133433.

The spelling of 213189497 in words is "two hundred thirteen million, one hundred eighty-nine thousand, four hundred ninety-seven".