1355670447 has 8 divisors (see below), whose sum is σ = 1825110144. Its totient is φ = 895005528.

The previous prime is 1355670427. The next prime is 1355670451. The reversal of 1355670447 is 7440765531.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1355670447 - 2⁶ = 1355670383 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 1355670399 and 1355670408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1355670427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2193333 + ... + 2193950.

It is an arithmetic number, because the mean of its divisors is an integer number (228138768).

Almost surely, 2^1355670447 is an apocalyptic number.

1355670447 is a deficient number, since it is larger than the sum of its proper divisors (469439697).

1355670447 is a wasteful number, since it uses less digits than its factorization.

1355670447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4387389.

The product of its (nonzero) digits is 352800, while the sum is 42.

The square root of 1355670447 is about 36819.4302916273. The cubic root of 1355670447 is about 1106.7547032934.

The spelling of 1355670447 in words is "one billion, three hundred fifty-five million, six hundred seventy thousand, four hundred forty-seven".