213818797 has 2 divisors, whose sum is σ = 213818798. Its totient is φ = 213818796.

The previous prime is 213818783. The next prime is 213818863. The reversal of 213818797 is 797818312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 187306596 + 26512201 = 13686^2 + 5149^2 .

It is a cyclic number.

It is not a de Polignac number, because 213818797 - 2¹⁹ = 213294509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213810797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106909398 + 106909399.

It is an arithmetic number, because the mean of its divisors is an integer number (106909399).

Almost surely, 2^213818797 is an apocalyptic number.

It is an amenable number.

213818797 is a deficient number, since it is larger than the sum of its proper divisors (1).

213818797 is an equidigital number, since it uses as much as digits as its factorization.

213818797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 169344, while the sum is 46.

The square root of 213818797 is about 14622.5441356831. The cubic root of 213818797 is about 597.9735310037.

The spelling of 213818797 in words is "two hundred thirteen million, eight hundred eighteen thousand, seven hundred ninety-seven".