690099653 has 2 divisors, whose sum is σ = 690099654. Its totient is φ = 690099652.

The previous prime is 690099643. The next prime is 690099667. The reversal of 690099653 is 356990096.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 612958564 + 77141089 = 24758^2 + 8783^2 .

It is a cyclic number.

It is not a de Polignac number, because 690099653 - 2²⁸ = 421664197 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 690099598 and 690099607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (690099643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345049826 + 345049827.

It is an arithmetic number, because the mean of its divisors is an integer number (345049827).

Almost surely, 2^690099653 is an apocalyptic number.

It is an amenable number.

690099653 is a deficient number, since it is larger than the sum of its proper divisors (1).

690099653 is an equidigital number, since it uses as much as digits as its factorization.

690099653 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 393660, while the sum is 47.

The square root of 690099653 is about 26269.7478670809. The cubic root of 690099653 is about 883.6981307388.

The spelling of 690099653 in words is "six hundred ninety million, ninety-nine thousand, six hundred fifty-three".