1398299591 has 16 divisors (see below), whose sum is σ = 1521214464. Its totient is φ = 1277627904.

The previous prime is 1398299579. The next prime is 1398299611. The reversal of 1398299591 is 1959928931.

It is a cyclic number.

It is not a de Polignac number, because 1398299591 - 2⁶ = 1398299527 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 (1398299531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1077455 + ... + 1078751.

It is an arithmetic number, because the mean of its divisors is an integer number (95075904).

Almost surely, 2^1398299591 is an apocalyptic number.

1398299591 is a deficient number, since it is larger than the sum of its proper divisors (122914873).

1398299591 is a wasteful number, since it uses less digits than its factorization.

1398299591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2090.

The product of its digits is 1574640, while the sum is 56.

The square root of 1398299591 is about 37393.8442928779. The cubic root of 1398299591 is about 1118.2358469861.

The spelling of 1398299591 in words is "one billion, three hundred ninety-eight million, two hundred ninety-nine thousand, five hundred ninety-one".