1341778357 has 2 divisors, whose sum is σ = 1341778358. Its totient is φ = 1341778356.

The previous prime is 1341778349. The next prime is 1341778421. The reversal of 1341778357 is 7538771431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 883218961 + 458559396 = 29719^2 + 21414^2 .

It is a cyclic number.

It is not a de Polignac number, because 1341778357 - 2³ = 1341778349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1341778307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670889178 + 670889179.

It is an arithmetic number, because the mean of its divisors is an integer number (670889179).

Almost surely, 2^1341778357 is an apocalyptic number.

It is an amenable number.

1341778357 is a deficient number, since it is larger than the sum of its proper divisors (1).

1341778357 is an equidigital number, since it uses as much as digits as its factorization.

1341778357 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 493920, while the sum is 46.

The square root of 1341778357 is about 36630.2928871720. The cubic root of 1341778357 is about 1102.9612652970.

The spelling of 1341778357 in words is "one billion, three hundred forty-one million, seven hundred seventy-eight thousand, three hundred fifty-seven".