612330921 has 10 divisors (see below), whose sum is σ = 914716682. Its totient is φ = 408220560.

The previous prime is 612330919. The next prime is 612330959. The reversal of 612330921 is 129033216.

It can be written as a sum of positive squares in only one way, i.e., 343731600 + 268599321 = 18540^2 + 16389^2 .

It is not a de Polignac number, because 612330921 - 2¹ = 612330919 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (612330221) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3779740 + ... + 3779901.

Almost surely, 2^612330921 is an apocalyptic number.

It is an amenable number.

612330921 is a deficient number, since it is larger than the sum of its proper divisors (302385761).

612330921 is an equidigital number, since it uses as much as digits as its factorization.

612330921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7559653 (or 7559644 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 612330921 is about 24745.3211941167. The cubic root of 612330921 is about 849.1714745606.

The spelling of 612330921 in words is "six hundred twelve million, three hundred thirty thousand, nine hundred twenty-one".