1213740377 has 2 divisors, whose sum is σ = 1213740378. Its totient is φ = 1213740376.

The previous prime is 1213740323. The next prime is 1213740391. The reversal of 1213740377 is 7730473121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 907455376 + 306285001 = 30124^2 + 17501^2 .

It is a cyclic number.

It is not a de Polignac number, because 1213740377 - 2¹² = 1213736281 is a prime.

It is not a weakly prime, because it can be changed into another prime (1213740977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606870188 + 606870189.

It is an arithmetic number, because the mean of its divisors is an integer number (606870189).

Almost surely, 2^1213740377 is an apocalyptic number.

It is an amenable number.

1213740377 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213740377 is an equidigital number, since it uses as much as digits as its factorization.

1213740377 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24696, while the sum is 35.

The square root of 1213740377 is about 34838.7769159596. The cubic root of 1213740377 is about 1066.6991111985.

The spelling of 1213740377 in words is "one billion, two hundred thirteen million, seven hundred forty thousand, three hundred seventy-seven".