851452813 has 2 divisors, whose sum is σ = 851452814. Its totient is φ = 851452812.

The previous prime is 851452793. The next prime is 851452841. The reversal of 851452813 is 318254158.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 847217449 + 4235364 = 29107^2 + 2058^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-851452813 is a prime.

It is a super-2 number, since 2×851452813² = 1449943785531225938, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (851452883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 425726406 + 425726407.

It is an arithmetic number, because the mean of its divisors is an integer number (425726407).

Almost surely, 2^851452813 is an apocalyptic number.

It is an amenable number.

851452813 is a deficient number, since it is larger than the sum of its proper divisors (1).

851452813 is an equidigital number, since it uses as much as digits as its factorization.

851452813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38400, while the sum is 37.

The square root of 851452813 is about 29179.6643743550. The cubic root of 851452813 is about 947.8076176909.

The spelling of 851452813 in words is "eight hundred fifty-one million, four hundred fifty-two thousand, eight hundred thirteen".