612312247 has 4 divisors (see below), whose sum is σ = 620700160. Its totient is φ = 603924336.

The previous prime is 612312229. The next prime is 612312289. The reversal of 612312247 is 742213216.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-612312247 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 (612310247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4193847 + ... + 4193992.

It is an arithmetic number, because the mean of its divisors is an integer number (155175040).

Almost surely, 2^612312247 is an apocalyptic number.

612312247 is the 14287-th hex number.

612312247 is a deficient number, since it is larger than the sum of its proper divisors (8387913).

612312247 is an equidigital number, since it uses as much as digits as its factorization.

612312247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8387912.

The product of its digits is 4032, while the sum is 28.

The square root of 612312247 is about 24744.9438673843. The cubic root of 612312247 is about 849.1628421970.

It can be divided in two parts, 6123 and 12247, that multiplied together give a triangular number (74988381 = T₁₂₂₄₆).

The spelling of 612312247 in words is "six hundred twelve million, three hundred twelve thousand, two hundred forty-seven".