918692641 has 2 divisors, whose sum is σ = 918692642. Its totient is φ = 918692640.

The previous prime is 918692633. The next prime is 918692701. The reversal of 918692641 is 146296819.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 474368400 + 444324241 = 21780^2 + 21079^2 .

It is an emirp because it is prime and its reverse (146296819) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 918692641 - 2³ = 918692633 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 918692591 and 918692600.

It is not a weakly prime, because it can be changed into another prime (918692941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 459346320 + 459346321.

It is an arithmetic number, because the mean of its divisors is an integer number (459346321).

Almost surely, 2^918692641 is an apocalyptic number.

It is an amenable number.

918692641 is a deficient number, since it is larger than the sum of its proper divisors (1).

918692641 is an equidigital number, since it uses as much as digits as its factorization.

918692641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 46.

The square root of 918692641 is about 30309.9429395702. The cubic root of 918692641 is about 972.1279111728.

The spelling of 918692641 in words is "nine hundred eighteen million, six hundred ninety-two thousand, six hundred forty-one".