612271381 has 2 divisors, whose sum is σ = 612271382. Its totient is φ = 612271380.

The previous prime is 612271343. The next prime is 612271391. The reversal of 612271381 is 183172216.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 385768881 + 226502500 = 19641^2 + 15050^2 .

It is a cyclic number.

It is not a de Polignac number, because 612271381 - 2²⁹ = 75400469 is a prime.

It is a super-2 number, since 2×612271381² = 749752487983294322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (612271321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306135690 + 306135691.

It is an arithmetic number, because the mean of its divisors is an integer number (306135691).

Almost surely, 2^612271381 is an apocalyptic number.

It is an amenable number.

612271381 is a deficient number, since it is larger than the sum of its proper divisors (1).

612271381 is an equidigital number, since it uses as much as digits as its factorization.

612271381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 31.

The square root of 612271381 is about 24744.1181091588. The cubic root of 612271381 is about 849.1439506043.

The spelling of 612271381 in words is "six hundred twelve million, two hundred seventy-one thousand, three hundred eighty-one".