690813433 has 2 divisors, whose sum is σ = 690813434. Its totient is φ = 690813432.

The previous prime is 690813401. The next prime is 690813439. The reversal of 690813433 is 334318096.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 645007609 + 45805824 = 25397^2 + 6768^2 .

It is a cyclic number.

It is not a de Polignac number, because 690813433 - 2⁵ = 690813401 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 690813392 and 690813401.

It is not a weakly prime, because it can be changed into another prime (690813439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345406716 + 345406717.

It is an arithmetic number, because the mean of its divisors is an integer number (345406717).

Almost surely, 2^690813433 is an apocalyptic number.

It is an amenable number.

690813433 is a deficient number, since it is larger than the sum of its proper divisors (1).

690813433 is an equidigital number, since it uses as much as digits as its factorization.

690813433 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 690813433 is about 26283.3299450431. The cubic root of 690813433 is about 884.0026996532.

The spelling of 690813433 in words is "six hundred ninety million, eight hundred thirteen thousand, four hundred thirty-three".