1355820623 has 2 divisors, whose sum is σ = 1355820624. Its totient is φ = 1355820622.

The previous prime is 1355820593. The next prime is 1355820671. The reversal of 1355820623 is 3260285531.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1355820623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1355820523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 677910311 + 677910312.

It is an arithmetic number, because the mean of its divisors is an integer number (677910312).

Almost surely, 2^1355820623 is an apocalyptic number.

1355820623 is a deficient number, since it is larger than the sum of its proper divisors (1).

1355820623 is an equidigital number, since it uses as much as digits as its factorization.

1355820623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 1355820623 is about 36821.4695931599. The cubic root of 1355820623 is about 1106.7955691390.

The spelling of 1355820623 in words is "one billion, three hundred fifty-five million, eight hundred twenty thousand, six hundred twenty-three".