1355663941 has 4 divisors (see below), whose sum is σ = 1355819884. Its totient is φ = 1355508000.

The previous prime is 1355663923. The next prime is 1355663951. The reversal of 1355663941 is 1493665531.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1493665531 = 743 ⋅2010317.

It can be written as a sum of positive squares in 2 ways, for example, as 1226750625 + 128913316 = 35025^2 + 11354^2 .

It is a cyclic number.

It is not a de Polignac number, because 1355663941 - 2²⁹ = 818793029 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 (1355663921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64110 + ... + 82591.

It is an arithmetic number, because the mean of its divisors is an integer number (338954971).

Almost surely, 2^1355663941 is an apocalyptic number.

It is an amenable number.

1355663941 is a deficient number, since it is larger than the sum of its proper divisors (155943).

1355663941 is an equidigital number, since it uses as much as digits as its factorization.

1355663941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155942.

The product of its digits is 291600, while the sum is 43.

The square root of 1355663941 is about 36819.3419414307. The cubic root of 1355663941 is about 1106.7529328145.

The spelling of 1355663941 in words is "one billion, three hundred fifty-five million, six hundred sixty-three thousand, nine hundred forty-one".