612748621 has 8 divisors (see below), whose sum is σ = 615074688. Its totient is φ = 610428000.

The previous prime is 612748607. The next prime is 612748639. The reversal of 612748621 is 126847216.

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 612748621 - 2⁹ = 612748109 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 (612758621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 473986 + ... + 475276.

It is an arithmetic number, because the mean of its divisors is an integer number (76884336).

Almost surely, 2^612748621 is an apocalyptic number.

It is an amenable number.

612748621 is a deficient number, since it is larger than the sum of its proper divisors (2326067).

612748621 is a wasteful number, since it uses less digits than its factorization.

612748621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2723.

The product of its digits is 32256, while the sum is 37.

The square root of 612748621 is about 24753.7597346343. The cubic root of 612748621 is about 849.3645174023.

The spelling of 612748621 in words is "six hundred twelve million, seven hundred forty-eight thousand, six hundred twenty-one".