655399 has 2 divisors, whose sum is σ = 655400. Its totient is φ = 655398.

The previous prime is 655387. The next prime is 655439. The reversal of 655399 is 993556.

655399 = 328² + 329² + ... + 333².

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 655399 - 2¹⁹ = 131111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (655379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327699 + 327700.

It is an arithmetic number, because the mean of its divisors is an integer number (327700).

2⁶⁵⁵³⁹⁹ is an apocalyptic number.

655399 is a deficient number, since it is larger than the sum of its proper divisors (1).

655399 is an equidigital number, since it uses as much as digits as its factorization.

655399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36450, while the sum is 37.

The square root of 655399 is about 809.5671683066. The cubic root of 655399 is about 86.8630867159.

The spelling of 655399 in words is "six hundred fifty-five thousand, three hundred ninety-nine".