612130637 has 4 divisors (see below), whose sum is σ = 633238620. Its totient is φ = 591022656.

The previous prime is 612130633. The next prime is 612130661. The reversal of 612130637 is 736031216.

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 227225476 + 384905161 = 15074^2 + 19619^2 .

It is a cyclic number.

It is not a de Polignac number, because 612130637 - 2² = 612130633 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 21107953 = 612130637 / (6 + 1 + 2 + 1 + 3 + 0 + 6 + 3 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (612130633) 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, 10553948 + ... + 10554005.

It is an arithmetic number, because the mean of its divisors is an integer number (158309655).

Almost surely, 2^612130637 is an apocalyptic number.

It is an amenable number.

612130637 is a deficient number, since it is larger than the sum of its proper divisors (21107983).

612130637 is a wasteful number, since it uses less digits than its factorization.

612130637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21107982.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 612130637 is about 24741.2739566903. The cubic root of 612130637 is about 849.0788808338.

The spelling of 612130637 in words is "six hundred twelve million, one hundred thirty thousand, six hundred thirty-seven".