1353717978 has 16 divisors (see below), whose sum is σ = 2751820896. Its totient is φ = 443841840.

The previous prime is 1353717949. The next prime is 1353717983. The reversal of 1353717978 is 8797173531.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1353717978.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1848976 + ... + 1849707.

It is an arithmetic number, because the mean of its divisors is an integer number (171988806).

Almost surely, 2^1353717978 is an apocalyptic number.

1353717978 is an abundant number, since it is smaller than the sum of its proper divisors (1398102918).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1353717978 is a wasteful number, since it uses less digits than its factorization.

1353717978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3698749.

The product of its digits is 1111320, while the sum is 51.

The square root of 1353717978 is about 36792.9066261419. The cubic root of 1353717978 is about 1106.2231231492.

The spelling of 1353717978 in words is "one billion, three hundred fifty-three million, seven hundred seventeen thousand, nine hundred seventy-eight".