656897147 has 2 divisors, whose sum is σ = 656897148. Its totient is φ = 656897146.

The previous prime is 656897117. The next prime is 656897167. The reversal of 656897147 is 741798656.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 656897147 - 2⁶ = 656897083 is a prime.

It is not a weakly prime, because it can be changed into another prime (656897117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328448573 + 328448574.

It is an arithmetic number, because the mean of its divisors is an integer number (328448574).

Almost surely, 2^656897147 is an apocalyptic number.

656897147 is a deficient number, since it is larger than the sum of its proper divisors (1).

656897147 is an equidigital number, since it uses as much as digits as its factorization.

656897147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2540160, while the sum is 53.

The square root of 656897147 is about 25630.0048185715. The cubic root of 656897147 is about 869.2922181978.

The spelling of 656897147 in words is "six hundred fifty-six million, eight hundred ninety-seven thousand, one hundred forty-seven".