1355541977 has 2 divisors, whose sum is σ = 1355541978. Its totient is φ = 1355541976.

The previous prime is 1355541917. The next prime is 1355542021. The reversal of 1355541977 is 7791455531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1201384921 + 154157056 = 34661^2 + 12416^2 .

It is a cyclic number.

It is not a de Polignac number, because 1355541977 - 2¹⁸ = 1355279833 is a prime.

It is not a weakly prime, because it can be changed into another prime (1355541917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 677770988 + 677770989.

It is an arithmetic number, because the mean of its divisors is an integer number (677770989).

Almost surely, 2^1355541977 is an apocalyptic number.

It is an amenable number.

1355541977 is a deficient number, since it is larger than the sum of its proper divisors (1).

1355541977 is an equidigital number, since it uses as much as digits as its factorization.

1355541977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 661500, while the sum is 47.

The square root of 1355541977 is about 36817.6856551305. The cubic root of 1355541977 is about 1106.7197416824.

The spelling of 1355541977 in words is "one billion, three hundred fifty-five million, five hundred forty-one thousand, nine hundred seventy-seven".