1394353257 has 32 divisors (see below), whose sum is σ = 2055559680. Its totient is φ = 833723520.

The previous prime is 1394353253. The next prime is 1394353283. The reversal of 1394353257 is 7523534931.

It is not a de Polignac number, because 1394353257 - 2² = 1394353253 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1394353253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 808398 + ... + 810120.

It is an arithmetic number, because the mean of its divisors is an integer number (64236240).

Almost surely, 2^1394353257 is an apocalyptic number.

It is an amenable number.

1394353257 is a deficient number, since it is larger than the sum of its proper divisors (661206423).

1394353257 is a wasteful number, since it uses less digits than its factorization.

1394353257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2053.

The product of its digits is 340200, while the sum is 42.

The square root of 1394353257 is about 37341.0398489383. The cubic root of 1394353257 is about 1117.1828799536.

The spelling of 1394353257 in words is "one billion, three hundred ninety-four million, three hundred fifty-three thousand, two hundred fifty-seven".