612408621 has 16 divisors (see below), whose sum is σ = 894781440. Its totient is φ = 369487920.

The previous prime is 612408569. The next prime is 612408647. The reversal of 612408621 is 126804216.

It is not a de Polignac number, because 612408621 - 2¹⁰ = 612407597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (612408661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34251 + ... + 48968.

It is an arithmetic number, because the mean of its divisors is an integer number (55923840).

Almost surely, 2^612408621 is an apocalyptic number.

It is an amenable number.

612408621 is a deficient number, since it is larger than the sum of its proper divisors (282372819).

612408621 is a wasteful number, since it uses less digits than its factorization.

612408621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83456.

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 612408621 is about 24746.8911380804. The cubic root of 612408621 is about 849.2073907788.

The spelling of 612408621 in words is "six hundred twelve million, four hundred eight thousand, six hundred twenty-one".