812957143 has 16 divisors (see below), whose sum is σ = 844947936. Its totient is φ = 781634560.

The previous prime is 812957141. The next prime is 812957177. The reversal of 812957143 is 341759218.

It is not a de Polignac number, because 812957143 - 2¹ = 812957141 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 812957096 and 812957105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812957141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1051305 + ... + 1052077.

It is an arithmetic number, because the mean of its divisors is an integer number (52809246).

Almost surely, 2^812957143 is an apocalyptic number.

812957143 is a deficient number, since it is larger than the sum of its proper divisors (31990793).

812957143 is a wasteful number, since it uses less digits than its factorization.

812957143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1154.

The product of its digits is 60480, while the sum is 40.

The square root of 812957143 is about 28512.4033185559. The cubic root of 812957143 is about 933.3027606340.

The spelling of 812957143 in words is "eight hundred twelve million, nine hundred fifty-seven thousand, one hundred forty-three".