690613403 has 2 divisors, whose sum is σ = 690613404. Its totient is φ = 690613402.

The previous prime is 690613397. The next prime is 690613409. The reversal of 690613403 is 304316096.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (690613397) and next prime (690613409).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-690613403 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 690613403.

It is not a weakly prime, because it can be changed into another prime (690613409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345306701 + 345306702.

It is an arithmetic number, because the mean of its divisors is an integer number (345306702).

Almost surely, 2^690613403 is an apocalyptic number.

690613403 is a deficient number, since it is larger than the sum of its proper divisors (1).

690613403 is an equidigital number, since it uses as much as digits as its factorization.

690613403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 690613403 is about 26279.5244058944. The cubic root of 690613403 is about 883.9173683026.

Adding to 690613403 its reverse (304316096), we get a palindrome (994929499).

The spelling of 690613403 in words is "six hundred ninety million, six hundred thirteen thousand, four hundred three".