690926841 has 20 divisors (see below), whose sum is σ = 1125956304. Its totient is φ = 418743000.

The previous prime is 690926833. The next prime is 690926851. The reversal of 690926841 is 148629096.

It is a happy number.

It is not a de Polignac number, because 690926841 - 2³ = 690926833 is a prime.

It is a super-2 number, since 2×690926841² = 954759799228478562, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (690926851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 386835 + ... + 388616.

Almost surely, 2^690926841 is an apocalyptic number.

It is an amenable number.

690926841 is a deficient number, since it is larger than the sum of its proper divisors (435029463).

690926841 is a wasteful number, since it uses less digits than its factorization.

690926841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 775474 (or 775465 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 690926841 is about 26285.4872695942. The cubic root of 690926841 is about 884.0510713688.

The spelling of 690926841 in words is "six hundred ninety million, nine hundred twenty-six thousand, eight hundred forty-one".