612912137 has 4 divisors (see below), whose sum is σ = 618980676. Its totient is φ = 606843600.

The previous prime is 612912133. The next prime is 612912151. The reversal of 612912137 is 731219216.

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 578113936 + 34798201 = 24044^2 + 5899^2 .

It is a cyclic number.

It is not a de Polignac number, because 612912137 - 2² = 612912133 is a prime.

It is a super-2 number, since 2×612912137² = 751322575363813538, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (612912133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3034118 + ... + 3034319.

It is an arithmetic number, because the mean of its divisors is an integer number (154745169).

Almost surely, 2^612912137 is an apocalyptic number.

It is an amenable number.

612912137 is a deficient number, since it is larger than the sum of its proper divisors (6068539).

612912137 is a wasteful number, since it uses less digits than its factorization.

612912137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6068538.

The product of its digits is 4536, while the sum is 32.

The square root of 612912137 is about 24757.0623661209. The cubic root of 612912137 is about 849.4400635188.

The spelling of 612912137 in words is "six hundred twelve million, nine hundred twelve thousand, one hundred thirty-seven".