690629801 has 2 divisors, whose sum is σ = 690629802. Its totient is φ = 690629800.

The previous prime is 690629791. The next prime is 690629839. The reversal of 690629801 is 108926096.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 535876201 + 154753600 = 23149^2 + 12440^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-690629801 is a prime.

It is not a weakly prime, because it can be changed into another prime (690629201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345314900 + 345314901.

It is an arithmetic number, because the mean of its divisors is an integer number (345314901).

Almost surely, 2^690629801 is an apocalyptic number.

It is an amenable number.

690629801 is a deficient number, since it is larger than the sum of its proper divisors (1).

690629801 is an equidigital number, since it uses as much as digits as its factorization.

690629801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 690629801 is about 26279.8363959900. The cubic root of 690629801 is about 883.9243641907.

The spelling of 690629801 in words is "six hundred ninety million, six hundred twenty-nine thousand, eight hundred one".