612126917 has 4 divisors (see below), whose sum is σ = 612365580. Its totient is φ = 611888256.

The previous prime is 612126913. The next prime is 612126929. The reversal of 612126917 is 719621216.

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

It can be written as a sum of positive squares in 2 ways, for example, as 122567041 + 489559876 = 11071^2 + 22126^2 .

It is a cyclic number.

It is not a de Polignac number, because 612126917 - 2² = 612126913 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 (612126913) 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, 115442 + ... + 120627.

It is an arithmetic number, because the mean of its divisors is an integer number (153091395).

Almost surely, 2^612126917 is an apocalyptic number.

It is an amenable number.

612126917 is a deficient number, since it is larger than the sum of its proper divisors (238663).

612126917 is a wasteful number, since it uses less digits than its factorization.

612126917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238662.

The product of its digits is 9072, while the sum is 35.

The square root of 612126917 is about 24741.1987785556. The cubic root of 612126917 is about 849.0771608415.

The spelling of 612126917 in words is "six hundred twelve million, one hundred twenty-six thousand, nine hundred seventeen".