1355978807 has 8 divisors (see below), whose sum is σ = 1359911280. Its totient is φ = 1352053440.

The previous prime is 1355978797. The next prime is 1355978809. The reversal of 1355978807 is 7088795531.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1355978807 - 2⁴ = 1355978791 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 (1355978809) 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, 772643 + ... + 774395.

It is an arithmetic number, because the mean of its divisors is an integer number (169988910).

Almost surely, 2^1355978807 is an apocalyptic number.

1355978807 is a deficient number, since it is larger than the sum of its proper divisors (3932473).

1355978807 is a wasteful number, since it uses less digits than its factorization.

1355978807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3553.

The product of its (nonzero) digits is 2116800, while the sum is 53.

The square root of 1355978807 is about 36823.6175164798. The cubic root of 1355978807 is about 1106.8386108558.

The spelling of 1355978807 in words is "one billion, three hundred fifty-five million, nine hundred seventy-eight thousand, eight hundred seven".