612138377 has 2 divisors, whose sum is σ = 612138378. Its totient is φ = 612138376.

The previous prime is 612138367. The next prime is 612138391. The reversal of 612138377 is 773831216.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 606587641 + 5550736 = 24629^2 + 2356^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-612138377 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 612138377.

It is not a weakly prime, because it can be changed into another prime (612138337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306069188 + 306069189.

It is an arithmetic number, because the mean of its divisors is an integer number (306069189).

Almost surely, 2^612138377 is an apocalyptic number.

It is an amenable number.

612138377 is a deficient number, since it is larger than the sum of its proper divisors (1).

612138377 is an equidigital number, since it uses as much as digits as its factorization.

612138377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336, while the sum is 38.

The square root of 612138377 is about 24741.4303749803. The cubic root of 612138377 is about 849.0824595050.

The spelling of 612138377 in words is "six hundred twelve million, one hundred thirty-eight thousand, three hundred seventy-seven".