690035641 has 2 divisors, whose sum is σ = 690035642. Its totient is φ = 690035640.

The previous prime is 690035579. The next prime is 690035677. The reversal of 690035641 is 146530096.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 537266041 + 152769600 = 23179^2 + 12360^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-690035641 is a prime.

It is a super-2 number, since 2×690035641² = 952298371700561762, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 690035597 and 690035606.

It is not a weakly prime, because it can be changed into another prime (690045641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345017820 + 345017821.

It is an arithmetic number, because the mean of its divisors is an integer number (345017821).

Almost surely, 2^690035641 is an apocalyptic number.

It is an amenable number.

690035641 is a deficient number, since it is larger than the sum of its proper divisors (1).

690035641 is an equidigital number, since it uses as much as digits as its factorization.

690035641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 690035641 is about 26268.5294792076. The cubic root of 690035641 is about 883.6708066494.

The spelling of 690035641 in words is "six hundred ninety million, thirty-five thousand, six hundred forty-one".