1355479839 has 20 divisors (see below), whose sum is σ = 2314118224. Its totient is φ = 774559584.

The previous prime is 1355479837. The next prime is 1355479847. The reversal of 1355479839 is 9389745531.

1355479839 is a `hidden beast` number, since 1 + 3 + 5 + 547 + 98 + 3 + 9 = 666.

It is not a de Polignac number, because 1355479839 - 2¹ = 1355479837 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 (1355479837) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1194742 + ... + 1195875.

Almost surely, 2^1355479839 is an apocalyptic number.

1355479839 is a deficient number, since it is larger than the sum of its proper divisors (958638385).

1355479839 is an equidigital number, since it uses as much as digits as its factorization.

1355479839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2390636 (or 2390627 counting only the distinct ones).

The product of its digits is 4082400, while the sum is 54.

The square root of 1355479839 is about 36816.8417847050. The cubic root of 1355479839 is about 1106.7028307584.

The spelling of 1355479839 in words is "one billion, three hundred fifty-five million, four hundred seventy-nine thousand, eight hundred thirty-nine".