654409793 has 2 divisors, whose sum is σ = 654409794. Its totient is φ = 654409792.

The previous prime is 654409771. The next prime is 654409801. The reversal of 654409793 is 397904456.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 435014449 + 219395344 = 20857^2 + 14812^2 .

It is a cyclic number.

It is not a de Polignac number, because 654409793 - 2²⁴ = 637632577 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (654409193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327204896 + 327204897.

It is an arithmetic number, because the mean of its divisors is an integer number (327204897).

Almost surely, 2^654409793 is an apocalyptic number.

It is an amenable number.

654409793 is a deficient number, since it is larger than the sum of its proper divisors (1).

654409793 is an equidigital number, since it uses as much as digits as its factorization.

654409793 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 816480, while the sum is 47.

The square root of 654409793 is about 25581.4345375704. The cubic root of 654409793 is about 868.1936330490.

The spelling of 654409793 in words is "six hundred fifty-four million, four hundred nine thousand, seven hundred ninety-three".