655519723 has 2 divisors, whose sum is σ = 655519724. Its totient is φ = 655519722.

The previous prime is 655519717. The next prime is 655519727. The reversal of 655519723 is 327915556.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-655519723 is a prime.

It is a super-2 number, since 2×655519723² = 859412214483993458, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 655519723.

It is not a weakly prime, because it can be changed into another prime (655519727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327759861 + 327759862.

It is an arithmetic number, because the mean of its divisors is an integer number (327759862).

Almost surely, 2^655519723 is an apocalyptic number.

655519723 is a deficient number, since it is larger than the sum of its proper divisors (1).

655519723 is an equidigital number, since it uses as much as digits as its factorization.

655519723 is an evil number, because the sum of its binary digits is even.

The product of its digits is 283500, while the sum is 43.

The square root of 655519723 is about 25603.1193997919. The cubic root of 655519723 is about 868.6841971587.

The spelling of 655519723 in words is "six hundred fifty-five million, five hundred nineteen thousand, seven hundred twenty-three".