1355689477 has 12 divisors (see below), whose sum is σ = 1438331076. Its totient is φ = 1276983680.

The previous prime is 1355689471. The next prime is 1355689481. The reversal of 1355689477 is 7749865531.

It can be written as a sum of positive squares in 6 ways, for example, as 7257636 + 1348431841 = 2694^2 + 36721^2 .

It is not a de Polignac number, because 1355689477 - 2³ = 1355689469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1355689471) 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 in 11 ways as a sum of consecutive naturals, for example, 14823 + ... + 54139.

It is an arithmetic number, because the mean of its divisors is an integer number (119860923).

Almost surely, 2^1355689477 is an apocalyptic number.

It is an amenable number.

1355689477 is a deficient number, since it is larger than the sum of its proper divisors (82641599).

1355689477 is an equidigital number, since it uses as much as digits as its factorization.

1355689477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39416 (or 39387 counting only the distinct ones).

The product of its digits is 6350400, while the sum is 55.

The square root of 1355689477 is about 36819.6887140562. The cubic root of 1355689477 is about 1106.7598818980.

The spelling of 1355689477 in words is "one billion, three hundred fifty-five million, six hundred eighty-nine thousand, four hundred seventy-seven".