812480857 has 2 divisors, whose sum is σ = 812480858. Its totient is φ = 812480856.

The previous prime is 812480807. The next prime is 812480863. The reversal of 812480857 is 758084218.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 715241536 + 97239321 = 26744^2 + 9861^2 .

It is a cyclic number.

It is not a de Polignac number, because 812480857 - 2¹⁵ = 812448089 is a prime.

It is a super-3 number, since 3×812480857³ (a number of 28 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (812480807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406240428 + 406240429.

It is an arithmetic number, because the mean of its divisors is an integer number (406240429).

Almost surely, 2^812480857 is an apocalyptic number.

It is an amenable number.

812480857 is a deficient number, since it is larger than the sum of its proper divisors (1).

812480857 is an equidigital number, since it uses as much as digits as its factorization.

812480857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 143360, while the sum is 43.

The square root of 812480857 is about 28504.0498350673. The cubic root of 812480857 is about 933.1204607918.

The spelling of 812480857 in words is "eight hundred twelve million, four hundred eighty thousand, eight hundred fifty-seven".