1398989013 has 4 divisors (see below), whose sum is σ = 1865318688. Its totient is φ = 932659340.

The previous prime is 1398988967. The next prime is 1398989017. The reversal of 1398989013 is 3109898931.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1398989013 - 2²¹ = 1396891861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1398989017) 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, 233164833 + ... + 233164838.

It is an arithmetic number, because the mean of its divisors is an integer number (466329672).

Almost surely, 2^1398989013 is an apocalyptic number.

It is an amenable number.

1398989013 is a deficient number, since it is larger than the sum of its proper divisors (466329675).

1398989013 is an equidigital number, since it uses as much as digits as its factorization.

1398989013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466329674.

The product of its (nonzero) digits is 419904, while the sum is 51.

The square root of 1398989013 is about 37403.0615458147. The cubic root of 1398989013 is about 1118.4195962894.

The spelling of 1398989013 in words is "one billion, three hundred ninety-eight million, nine hundred eighty-nine thousand, thirteen".