655513739 has 4 divisors (see below), whose sum is σ = 656311056. Its totient is φ = 654716424.

The previous prime is 655513723. The next prime is 655513741. The reversal of 655513739 is 937315556.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 655513739 - 2⁴ = 655513723 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 655513739.

It is not an unprimeable number, because it can be changed into a prime (655513759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 397424 + ... + 399069.

It is an arithmetic number, because the mean of its divisors is an integer number (164077764).

Almost surely, 2^655513739 is an apocalyptic number.

655513739 is a deficient number, since it is larger than the sum of its proper divisors (797317).

655513739 is an equidigital number, since it uses as much as digits as its factorization.

655513739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797316.

The product of its digits is 425250, while the sum is 44.

The square root of 655513739 is about 25603.0025387649. The cubic root of 655513739 is about 868.6815538504.

The spelling of 655513739 in words is "six hundred fifty-five million, five hundred thirteen thousand, seven hundred thirty-nine".