1355642783 has 4 divisors (see below), whose sum is σ = 1478883048. Its totient is φ = 1232402520.

The previous prime is 1355642773. The next prime is 1355642789. The reversal of 1355642783 is 3872465531.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1355642783 - 2⁴ = 1355642767 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 (1355642789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61620116 + ... + 61620137.

It is an arithmetic number, because the mean of its divisors is an integer number (369720762).

Almost surely, 2^1355642783 is an apocalyptic number.

1355642783 is a deficient number, since it is larger than the sum of its proper divisors (123240265).

1355642783 is a wasteful number, since it uses less digits than its factorization.

1355642783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123240264.

The product of its digits is 604800, while the sum is 44.

The square root of 1355642783 is about 36819.0546184988. The cubic root of 1355642783 is about 1106.7471750453.

The spelling of 1355642783 in words is "one billion, three hundred fifty-five million, six hundred forty-two thousand, seven hundred eighty-three".