851260493 has 2 divisors, whose sum is σ = 851260494. Its totient is φ = 851260492.

The previous prime is 851260483. The next prime is 851260511. The reversal of 851260493 is 394062158.

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., 639179524 + 212080969 = 25282^2 + 14563^2 .

It is a cyclic number.

It is not a de Polignac number, because 851260493 - 2²⁰ = 850211917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (851260433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 425630246 + 425630247.

It is an arithmetic number, because the mean of its divisors is an integer number (425630247).

Almost surely, 2^851260493 is an apocalyptic number.

It is an amenable number.

851260493 is a deficient number, since it is larger than the sum of its proper divisors (1).

851260493 is an equidigital number, since it uses as much as digits as its factorization.

851260493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 851260493 is about 29176.3687425286. The cubic root of 851260493 is about 947.7362510087.

The spelling of 851260493 in words is "eight hundred fifty-one million, two hundred sixty thousand, four hundred ninety-three".