690053213 has 2 divisors, whose sum is σ = 690053214. Its totient is φ = 690053212.

The previous prime is 690053209. The next prime is 690053233. The reversal of 690053213 is 312350096.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 488498404 + 201554809 = 22102^2 + 14197^2 .

It is a cyclic number.

It is not a de Polignac number, because 690053213 - 2² = 690053209 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (690053233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345026606 + 345026607.

It is an arithmetic number, because the mean of its divisors is an integer number (345026607).

Almost surely, 2^690053213 is an apocalyptic number.

It is an amenable number.

690053213 is a deficient number, since it is larger than the sum of its proper divisors (1).

690053213 is an equidigital number, since it uses as much as digits as its factorization.

690053213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4860, while the sum is 29.

The square root of 690053213 is about 26268.8639457438. The cubic root of 690053213 is about 883.6783075816.

The spelling of 690053213 in words is "six hundred ninety million, fifty-three thousand, two hundred thirteen".