649097143 has 2 divisors, whose sum is σ = 649097144. Its totient is φ = 649097142.

The previous prime is 649097107. The next prime is 649097153. The reversal of 649097143 is 341790946.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-649097143 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 649097143.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (649097153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324548571 + 324548572.

It is an arithmetic number, because the mean of its divisors is an integer number (324548572).

Almost surely, 2^649097143 is an apocalyptic number.

649097143 is a deficient number, since it is larger than the sum of its proper divisors (1).

649097143 is an equidigital number, since it uses as much as digits as its factorization.

649097143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 649097143 is about 25477.3849325240. The cubic root of 649097143 is about 865.8378476844.

The spelling of 649097143 in words is "six hundred forty-nine million, ninety-seven thousand, one hundred forty-three".