612196381 has 2 divisors, whose sum is σ = 612196382. Its totient is φ = 612196380.

The previous prime is 612196373. The next prime is 612196393. The reversal of 612196381 is 183691216.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 530565156 + 81631225 = 23034^2 + 9035^2 .

It is a cyclic number.

It is not a de Polignac number, because 612196381 - 2³ = 612196373 is a prime.

It is a super-2 number, since 2×612196381² = 749568817818994322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 612196381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (612196181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306098190 + 306098191.

It is an arithmetic number, because the mean of its divisors is an integer number (306098191).

Almost surely, 2^612196381 is an apocalyptic number.

It is an amenable number.

612196381 is a deficient number, since it is larger than the sum of its proper divisors (1).

612196381 is an equidigital number, since it uses as much as digits as its factorization.

612196381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 37.

The square root of 612196381 is about 24742.6025510656. The cubic root of 612196381 is about 849.1092773103.

It can be divided in two parts, 61219 and 6381, that added together give a square (67600 = 260²).

The spelling of 612196381 in words is "six hundred twelve million, one hundred ninety-six thousand, three hundred eighty-one".