213770077 has 2 divisors, whose sum is σ = 213770078. Its totient is φ = 213770076.

The previous prime is 213770059. The next prime is 213770113. The reversal of 213770077 is 770077312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 169494361 + 44275716 = 13019^2 + 6654^2 .

It is a cyclic number.

It is not a de Polignac number, because 213770077 - 2¹¹ = 213768029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213770177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106885038 + 106885039.

It is an arithmetic number, because the mean of its divisors is an integer number (106885039).

Almost surely, 2^213770077 is an apocalyptic number.

It is an amenable number.

213770077 is a deficient number, since it is larger than the sum of its proper divisors (1).

213770077 is an equidigital number, since it uses as much as digits as its factorization.

213770077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14406, while the sum is 34.

The square root of 213770077 is about 14620.8781200036. The cubic root of 213770077 is about 597.9281101709.

The spelling of 213770077 in words is "two hundred thirteen million, seven hundred seventy thousand, seventy-seven".