612910921 has 8 divisors (see below), whose sum is σ = 713686464. Its totient is φ = 515439600.

The previous prime is 612910867. The next prime is 612910933. The reversal of 612910921 is 129019216.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 612910921 - 2¹³ = 612902729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (612910121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 825655 + ... + 826396.

It is an arithmetic number, because the mean of its divisors is an integer number (89210808).

Almost surely, 2^612910921 is an apocalyptic number.

It is an amenable number.

612910921 is a deficient number, since it is larger than the sum of its proper divisors (100775543).

612910921 is a wasteful number, since it uses less digits than its factorization.

612910921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1652111.

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 612910921 is about 24757.0378074599. The cubic root of 612910921 is about 849.4395017635.

The spelling of 612910921 in words is "six hundred twelve million, nine hundred ten thousand, nine hundred twenty-one".