841688401 has 4 divisors (see below), whose sum is σ = 841806900. Its totient is φ = 841569904.

The previous prime is 841688399. The next prime is 841688413. The reversal of 841688401 is 104886148.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 256000000 + 585688401 = 16000^2 + 24201^2 .

It is a cyclic number.

It is not a de Polignac number, because 841688401 - 2¹ = 841688399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (841688101) 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 in 3 ways as a sum of consecutive naturals, for example, 47866 + ... + 63043.

It is an arithmetic number, because the mean of its divisors is an integer number (210451725).

Almost surely, 2^841688401 is an apocalyptic number.

It is an amenable number.

841688401 is a deficient number, since it is larger than the sum of its proper divisors (118499).

841688401 is a wasteful number, since it uses less digits than its factorization.

841688401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118498.

The product of its (nonzero) digits is 49152, while the sum is 40.

The square root of 841688401 is about 29011.8665549116. The cubic root of 841688401 is about 944.1705443484.

The spelling of 841688401 in words is "eight hundred forty-one million, six hundred eighty-eight thousand, four hundred one".