1398857349287 has 4 divisors (see below), whose sum is σ = 1399741025760. Its totient is φ = 1397973672816.

The previous prime is 1398857349229. The next prime is 1398857349299. The reversal of 1398857349287 is 7829437588931.

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 1398857349287 - 2¹⁶ = 1398857283751 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 (1398857349587) 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, 441835862 + ... + 441839027.

It is an arithmetic number, because the mean of its divisors is an integer number (349935256440).

Almost surely, 2^{1398857349287} is an apocalyptic number.

1398857349287 is a deficient number, since it is larger than the sum of its proper divisors (883676473).

1398857349287 is an equidigital number, since it uses as much as digits as its factorization.

1398857349287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883676472.

The product of its digits is 731566080, while the sum is 74.

The spelling of 1398857349287 in words is "one trillion, three hundred ninety-eight billion, eight hundred fifty-seven million, three hundred forty-nine thousand, two hundred eighty-seven".