651040843 has 2 divisors, whose sum is σ = 651040844. Its totient is φ = 651040842.

The previous prime is 651040811. The next prime is 651040847. The reversal of 651040843 is 348040156.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 651040843 - 2⁵ = 651040811 is a prime.

It is not a weakly prime, because it can be changed into another prime (651040847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325520421 + 325520422.

It is an arithmetic number, because the mean of its divisors is an integer number (325520422).

Almost surely, 2^651040843 is an apocalyptic number.

651040843 is a deficient number, since it is larger than the sum of its proper divisors (1).

651040843 is an equidigital number, since it uses as much as digits as its factorization.

651040843 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 651040843 is about 25515.5020134819. The cubic root of 651040843 is about 866.7012274351.

Adding to 651040843 its reverse (348040156), we get a palindrome (999080999).

The spelling of 651040843 in words is "six hundred fifty-one million, forty thousand, eight hundred forty-three".