612021393 has 8 divisors (see below), whose sum is σ = 906698400. Its totient is φ = 408014244.

The previous prime is 612021383. The next prime is 612021409. The reversal of 612021393 is 393120216.

It is not a de Polignac number, because 612021393 - 2⁹ = 612020881 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 22667459 = 612021393 / (6 + 1 + 2 + 0 + 2 + 1 + 3 + 9 + 3).

It is not an unprimeable number, because it can be changed into a prime (612021323) 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, 11333703 + ... + 11333756.

It is an arithmetic number, because the mean of its divisors is an integer number (113337300).

Almost surely, 2^612021393 is an apocalyptic number.

It is an amenable number.

612021393 is a deficient number, since it is larger than the sum of its proper divisors (294677007).

612021393 is a wasteful number, since it uses less digits than its factorization.

612021393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22667468 (or 22667462 counting only the distinct ones).

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

The square root of 612021393 is about 24739.0661303130. The cubic root of 612021393 is about 849.0283674923.

The spelling of 612021393 in words is "six hundred twelve million, twenty-one thousand, three hundred ninety-three".