855507901 has 2 divisors, whose sum is σ = 855507902. Its totient is φ = 855507900.

The previous prime is 855507883. The next prime is 855507911. The reversal of 855507901 is 109705558.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 819447876 + 36060025 = 28626^2 + 6005^2 .

It is a cyclic number.

It is not a de Polignac number, because 855507901 - 2⁷ = 855507773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (855507911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427753950 + 427753951.

It is an arithmetic number, because the mean of its divisors is an integer number (427753951).

Almost surely, 2^855507901 is an apocalyptic number.

It is an amenable number.

855507901 is a deficient number, since it is larger than the sum of its proper divisors (1).

855507901 is an equidigital number, since it uses as much as digits as its factorization.

855507901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63000, while the sum is 40.

The square root of 855507901 is about 29249.0666688700. The cubic root of 855507901 is about 949.3098962273.

The spelling of 855507901 in words is "eight hundred fifty-five million, five hundred seven thousand, nine hundred one".