612513005 has 8 divisors (see below), whose sum is σ = 791555352. Its totient is φ = 452317248.

The previous prime is 612512993. The next prime is 612513007. The reversal of 612513005 is 500315216.

It can be written as a sum of positive squares in 4 ways, for example, as 90573289 + 521939716 = 9517^2 + 22846^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 612513005 - 2¹⁸ = 612250861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (612513007) 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 7 ways as a sum of consecutive naturals, for example, 4711574 + ... + 4711703.

It is an arithmetic number, because the mean of its divisors is an integer number (98944419).

Almost surely, 2^612513005 is an apocalyptic number.

612513005 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

612513005 is a deficient number, since it is larger than the sum of its proper divisors (179042347).

612513005 is a wasteful number, since it uses less digits than its factorization.

612513005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9423295.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 612513005 is about 24749.0000808113. Note that the first 4 decimals coincide. The cubic root of 612513005 is about 849.2556366859.

It can be divided in two parts, 6125 and 13005, that multiplied together give a square (79655625 = 8925²).

The spelling of 612513005 in words is "six hundred twelve million, five hundred thirteen thousand, five".