612840469 has 2 divisors, whose sum is σ = 612840470. Its totient is φ = 612840468.

The previous prime is 612840439. The next prime is 612840511. The reversal of 612840469 is 964048216.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 412617969 + 200222500 = 20313^2 + 14150^2 .

It is a cyclic number.

It is not a de Polignac number, because 612840469 - 2⁹ = 612839957 is a prime.

It is a super-2 number, since 2×612840469² = 751146880888279922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (612840419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306420234 + 306420235.

It is an arithmetic number, because the mean of its divisors is an integer number (306420235).

Almost surely, 2^612840469 is an apocalyptic number.

It is an amenable number.

612840469 is a deficient number, since it is larger than the sum of its proper divisors (1).

612840469 is an equidigital number, since it uses as much as digits as its factorization.

612840469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 612840469 is about 24755.6148984427. The cubic root of 612840469 is about 849.4069538011.

The spelling of 612840469 in words is "six hundred twelve million, eight hundred forty thousand, four hundred sixty-nine".