1398111747 has 4 divisors (see below), whose sum is σ = 1864149000. Its totient is φ = 932074496.

The previous prime is 1398111707. The next prime is 1398111821. The reversal of 1398111747 is 7471118931.

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 1398111747 - 2⁷ = 1398111619 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1398111699 and 1398111708.

It is not an unprimeable number, because it can be changed into a prime (1398111707) 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, 233018622 + ... + 233018627.

It is an arithmetic number, because the mean of its divisors is an integer number (466037250).

Almost surely, 2^1398111747 is an apocalyptic number.

1398111747 is a deficient number, since it is larger than the sum of its proper divisors (466037253).

1398111747 is an equidigital number, since it uses as much as digits as its factorization.

1398111747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466037252.

The product of its digits is 42336, while the sum is 42.

The square root of 1398111747 is about 37391.3325116931. The cubic root of 1398111747 is about 1118.1857710933.

The spelling of 1398111747 in words is "one billion, three hundred ninety-eight million, one hundred eleven thousand, seven hundred forty-seven".