1397553851 has 4 divisors (see below), whose sum is σ = 1407755112. Its totient is φ = 1387352592.

The previous prime is 1397553841. The next prime is 1397553863. The reversal of 1397553851 is 1583557931.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1397553851 - 2¹⁴ = 1397537467 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1397553796 and 1397553805.

It is not an unprimeable number, because it can be changed into a prime (1397553841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5100425 + ... + 5100698.

It is an arithmetic number, because the mean of its divisors is an integer number (351938778).

Almost surely, 2^1397553851 is an apocalyptic number.

1397553851 is a deficient number, since it is larger than the sum of its proper divisors (10201261).

1397553851 is a wasteful number, since it uses less digits than its factorization.

1397553851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10201260.

The product of its digits is 567000, while the sum is 47.

The square root of 1397553851 is about 37383.8715357305. The cubic root of 1397553851 is about 1118.0370194250.

The spelling of 1397553851 in words is "one billion, three hundred ninety-seven million, five hundred fifty-three thousand, eight hundred fifty-one".