1398447723 has 8 divisors (see below), whose sum is σ = 1866164688. Its totient is φ = 931514624.

The previous prime is 1398447697. The next prime is 1398447731. The reversal of 1398447723 is 3277448931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1398447723 - 2⁵ = 1398447691 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1398447733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191790 + ... + 198947.

It is an arithmetic number, because the mean of its divisors is an integer number (233270586).

Almost surely, 2^1398447723 is an apocalyptic number.

1398447723 is a deficient number, since it is larger than the sum of its proper divisors (467716965).

1398447723 is a wasteful number, since it uses less digits than its factorization.

1398447723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391933.

The product of its digits is 1016064, while the sum is 48.

The square root of 1398447723 is about 37395.8249407604. The cubic root of 1398447723 is about 1118.2753331984.

The spelling of 1398447723 in words is "one billion, three hundred ninety-eight million, four hundred forty-seven thousand, seven hundred twenty-three".